MEDC 02 (2358) DTZS  
 
ICS: 23.020.30  
 
1 
  
 
 
DRAFT  TANZANIA STANDARD  
 
 
Identification of the contents of industrial gas cylinders  [Rev. TZS 
97:1980]  
  
 
 
 
 
 
  
 
 
 
 
 
 
 
  
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
TANZANIA BUREAU OF STANDARDS  
     
 
© TBS 2 024                                                                                                   Second   Edition 20 24 
  MEDC 02 (2358) DTZS  
 
ICS: 23.020.30  
 
2 
 This Tanzania Standard was published under the authority of the Board of Directors of Tanzania Bureau of 
Standards on 2024 –xx – yy.  
 
The Tanzania Bureau of Standards (TBS) is the statutory national standards body for Tanzania established under 
the Standards Act No. 3 of 1975, amended by Act No. 1 of 1977 and revised by Standards Act No. 02 of 2009.  
 
The Mechanical Engineering Divisional Standards Committee (MEDC) under whose supervision, this Tanzania 
Standard was prepared, consists of representatives from the following organizations:  
 
*University of Dar es Salaam (UDSM), College of Engineering and T echnology (CoET)  
*National Development Corporation (NDC)  
Weights and Measures Agency (WMA)  
Tanzania Industrial Research Development Organization (TIRDO)  
*Aluminium Africa Limited  
National Institute of Transport (NIT)  
*Dar Es Salaam Institute of Technolo gy (DIT)  
Ministry of Works  
Confederation of Tanzania Industries (CTI)  
 
 
The organizations marked with an asterisk (*) in the above list, together with the following, were directly 
represented on the Technical Committee entrusted with the preparation of this Tanzania Standard:  
 
Tanzania Automotive Technology Centre (TATC)   
Small Industries Development Organization (SIDO)   
M.M. Integrated  Steel Mills Limited  
Trans Auto Parts Company Limited (TAPCO)  
Tanzania Engineering and Manufactur ing Design Organization (TEMDO)  
 
 
 
 
Tanzania Bureau of Standards  
P O Box 9524  
Dar es Salaam  
Phone: 022 2450206/2450949/2450298  
Fax: 022 2450959  
Email: info@tbs.go.tz   
 
 
 
 
ISBN  
 
 
 
 
 
 
 
 
 
 
 
 
 
                   TANZANIA BUREAU OF STANDARDS    MEDC 02 (2358) DTZS  
 
ICS: 23.020.30  
 
3 
 Identification of the contents of industrial gas cylinders  
0 Foreword  
This draft  Tanzania Standard has been prepared under Metals and Structures Technical Committee (MEDC 02 ), 
under supervision of Mechanical Engineering Standards Divisional Committee  (MEDC) . 
During the preparation of this Tanzania Standard, assistance was derived from the following publications:  
IS 4379 :2021 , Identification of contents of industrial gas cylinders , published b y the Bureau of Indian 
Standards . 
 
1 Scope  
This standard covers the method of marking and colouring industrial gas cyli nders both for steel and aluminium 
cylinder. It does not cover colour coding for medical cylinders . 
 
2 Normative references  
The following standards contain provisions which, through reference in this text, constitute provisions of this 
standard. All standards are subject to revision and, since any reference to a standard is deemed to be a reference 
to the latest edition of that standard, parties to agreements based on this standard are encouraged to take steps to 
ensure the use of the most recent edit ions of the standards indicated below:  
ISO 817, Refrigerants — Designation and safety classification  
 
3 Identification marking  
3.1 Cylinders shall be legibly and durably marked, preferably at the valve end and off the cylindrical part of the 
body with the:  
a) Chemical formula and the name of the gas it contains; and  
b) In case of mixtures, the chemical formulae, name and proportion of the constituent gases in descending order 
of magnitude and UN Number.  
3.1.1 For gases, such as air and certain fuel gases where the exact chemical composition is not precisely 
determined, the chemical formula can be excluded, but its common usage name shall be mentioned.  
3.1.2 The chemical formulae and U.N. Number of gases (other than Refrigerants) shall be marked in accordance 
with Table 1 and for refrigerant gases shall be marked in accordance with Table 2, 3, 4, 5 and 6.  
3.1.3 Cylinders shall be le gibly and permanently marked, preferably at the valve end of the cylinder and shall 
extend down the cylinder to the shoulder. The  method of marking adopted shall be such that it does not weaken 
or damage the cylinder.  
3.1.4 The dimensions of the lettering  and figures shall commensurate with the size of the cylinder and as large 
as necessary for easy identification.  
The characters in marking shall normally be at least 6 mm in height. On cylinders below 140 mm diameter this 
height may be reduced, but in no case shall the characters be less than 3 mm in height. The indication shall not 
be of excessive depth.    MEDC 02 (2358) DTZS  
 
ICS: 23.020.30  
 
4 
 3.1.5 The colour of the lettering and figures shall contrast against the ground colour of the cylinder and shall be 
such as not to impair their legibili ty. 
 
4 Colour identification  
4.1 All gas cylinders (other than refrigerant cylinders) shall be painted externally in accordance with Table 7 to 
provide means for visual identification of the gaseous contents. The colour identification shall consist of a 
ground colour and may have addition al colour on shoulder and also may have additional colour band below 
shoulder. Generally, the band shall be painted immediately below shoulder unless otherwise specified. The 
width of the colour band shall be at least 0.25 D where D is the outside diameter  of the cylinder shell, shoulder 
colour band shall be painted round the neck of each cylinder adjacent to valve fitting.  
4.2 Colours of cylinders containing refrigerant gases will be as per Table 8, 9, 10, 11.  
4.3 Cylinders containing Refrigerant Mixture s will be assigned colour codes in consultation with Statutory 
Authority.  
4.4 Cylinder containing certain gas mixture with specified identification shall be coloured in accordance with 
Table 12.  
4.5 Cylinders containing gases or gas mixtures (other than r efrigerant gases) for which exclusive identification 
is not provided in Table 7 shall be colour -marked in accordance with Table 13.  
 
5 Specific colour code requirement for aluminum cylinders for industrial gases  
5.1 For aluminum cylinders, the following:  
a) For the cylinders with same ground and shoulder colour, only shoulder shall be painted and ground colour 
shall be omitted;  
b) For aluminum cylinders filled with gas mixtures as per Table 3, the colour band shall be painted just below 
the shoulder paint;  and  
c) For the unspecified gas mixtures, the body colour shall be omitted.  
 
 
 
 
 
 
 
 
 
 
 
 
   MEDC 02 (2358) DTZS  
 
ICS: 23.020.30  
 
5 
 Table 1 Name of Gases (Other Than Refrigerant Gases) with Chemical Formulae and UN Number  
(Clause 3.1.2)  
S/ No.  Name of Gas  UN No. Chemical Symbol  
i) Acetylene, dissolved  1001  C2H2 
ii) Air, compressed  1002  – 
iii) Ammonia (anhydrous or dissolved)*  1005  NH 3 
iv) Argon  1006  Ar 
v) Boron trichloride  1741  BCl 3 
vi) Boron trifluoride (boron fluoride) compressed  1008  BF 3 
vii) Butadience (vinylethylene, divinyl)  1010  C4H6 
viii) Butane*  1011  C4H10 
ix) Butane (commercial)           – 
x) Butylene  1012  C4H8 
xi) Carbon dioxide*  1013  CO 2 
xii) Carbon Monoxide compressed  1016  CO 
xiii) Chlorine  1017  Cl2 
xiv) Chlorine trifluoride  1749  ClF 3 
xv) Chlorine pentafluoride  2548  ClF 5 
xvi) CNG  1971  CNG  
xvii)  Coal gas (town gas, lighting gas) compressed  1023  H2 + CO + CH 4 
xviii)  Cyanogen  1026  (CN) 2 
xix) Cyanogen chloride  1589  ClCN  
xx) Cyclopropane  1027  C3H6 
xxi) Dimethylamine  1032  (CH 3)2NH 
xxii)  Dimethyl ether (methyl ether, methyl oxide)  1033  (CH 3)2O 
xxiii)  Ethane*  1035  C2H6 
xxiv)  Ethylamine (aminoethane)  1036  C2H5NH 2 
xxv) Ethyl chloride (chloroethane)*  1037  C2H5Cl 
xxvi)  Ethylene*  1962  C2H4 
xxvii)  Ethylene oxide  1040  C2H4O 
xxviii)  Fluorine compressed  1045  F2 
xxix)  Helium compressed  1046  He 
xxx) Hydrogen compressed  1049  H2 
xxxi)  Hydrogen bromide, anhydrous  1048  HBr 
xxxii)  Hydrogen chloride, anhydrous  1050  HCl 
xxxiii)  Hydrogen cyanide  1613  HCN  
xxxiv)  Hydrogen fluoride, anhydrous  1052  HF  
xxxv)  Hydrogen sulphide  1053  H2S  
xxxvi)  Isobutane*  1069  CH (CH 3)3  
xxxvii)  Isobutylene  1055  CH 2= C(CH 3)2  
xxxviii)  Krypton  1056  Kr  
xxxix)  Liquefied petroleum gas (LPG)  1075  –  
xl)  Methane*  1971  CH 4  
xli)  Methanethiol (methylmercaptan)  1064  CH 3SH  
xlii)  Methyl acetylene  3161  CH 3C = CH  
xliii)  Methylamine (anhydrous)  1061  CH 3NH 2  
xliv)  Methyl bromide (bromomethane)*  1062  CH 3Br  
xlv)  Methyl chloride (chloromethane)*  1063  CH 3Cl  
xlvi)  Neon compressed  1065  Ne  
xlvii)  Nitrogen*  1066  N2  
xlviii)  Nitrogen peroxide (nitrogen dioxide)  1067  NO 2  
xlix)  Nitrogen tetroxide (dinitrogen tetroxide)  1974  N2O4  
l)  Nitrogen Trifluoride  2451  NF 3  
li)  Nitrous oxide  1070  N2O  
lii)  Nitrox  1956  –  
liii)  Oil gas, compressed  1022  CO = C MHN    MEDC 02 (2358) DTZS  
 
ICS: 23.020.30  
 
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 liv)  Oil gas, liquefied (Z -gas)  1065  CO + C MHN  
lv)  Oxygen compressed  1072  O2  
lvi)  Phosgene (carbonyl chloride)  1076  COCl 2  
lvii)  Propane*  1978  –  
lviii)  Propylene*  1077  C3H6  
lix)  Sulphur dioxide  1079  SO 2  
lx)  Sulphur hexafluoride  1980  SF 6  
lxi)  Trimethylamine  1083  (CH 3)3N  
lxii)  Vinyl bromide*  1085  CH 2 = CHBr  
lxiii)  Vinyl chloride*  1086  CH 2 = CHCl  
lxiv)  Vinyl methyl ether (methylvinyl oxide)  1087  CH 3OCH = CH 2  
lxv)  Water gas  1080  H2 = CO  
lxvi)  Xenon  2036  Xe  
NOTE* Gases are also used as refrigerant.  
1 Methyl Chloride  – R40,  
2 Ethyl Chloride – R160,  
3 Methyl Bromide – R40B1,  
4 Vinyl Bromide – R140B1,  
5 Venyl Chloride – R1140  
6 Ammonia,  Igerant -R717,  
7 Propylene -R1270,  
8 Ethylene -R1150,  
9 Propane -R290,  
10 Ethane -R170  
11 ISO  Butane  R-600, 
12 Butane  R-600, 
13 Carbon Dioxide R-744, 
14 Nitrogen  R-728, 
15 Methane  R-50, 
16 Ethene (Ethylene) R-1150. 
 
Table 2 : Name of Low Pressure Refrigerant Gases (Non Flammable) With Chemical Formulae and UN 
Number  
(Clause 3.1.2)  
S/No.  Name of Refrigerant Gas  Refrige -Rant No.  UN No.  Chemical Symbol  
i) Trichloromonofluoromethane  R-11 1029  CCl 3F 
ii) Octafluoropropane  R-218 2424  C3F8 
iii) Vinyl Fluoride  R-141 1950  C2H3F 
iv) Dibromotetrafluoro - Ethane  R-114B2  3082  C2Br2F2 
v) Dichlorodifluoromethane  R-12 1028  CCl 2F2 
vi) Bromochlorodifluoro Methane  R-12B1  1974  CBrClF 2  
vii) Chlorotrifluoromethane  R-13 1022  CClF 3 
viii) Dichlorofluoromethane  R-21 1029  CHCl 2F 
ix) Trichlorotrifluoroethane  R-113 3082  CCl 2FCClF 2 
x) Dichlorotetra -Fluoroethane  R-114 1958  C2Cl 2F4 
xi) Chloropentafluoroethane  R-115 1020  C2ClF 5 
xii) Chlorotetrafluoroethane  R-124 1021  CClF 2CHF 2 
xiii) Octafluorocyclobutane  R-C318  1976  C4F8 
xiv) Hexafluoropropene  R-1216  1858  C3F6 
xv) Ethyl Methyl Ether  R-227 3296  C3H8O 
xvi) R-134 A 1, 1, 1, 2 Tetrafluoroethane  R-134a  3159  CH 2-F-CF 3 
xvii)  Trichlorotrifluoroethane  R-113a  1983  C2H2ClF 3 
xviii)  Chlorotrifluoroethane  R-133a  1983  CH 2ClCF 3 
xix) Fluoroethane  R-161 2453  C2H5F 
xx) Chlorodifluoromethane  R-22 1018  CHClF 2 
xxi) 1, 1, 1, 3, 3, 3 -Hexafluoropropane  R-236fa  3163  C3H2F6 
xxii)  1, 1, 1, 3, 3 -Pentafluoropropane  R-245fa  3163  C3H3F5 
xxiii)  1, 2-Dichloro -1, 1, 2 -Rifluoroethane  R-123a  – CHCIFCCIF 2   MEDC 02 (2358) DTZS  
 
ICS: 23.020.30  
 
7 
 xiv) Octafluoropropane  R-218 2424  C3F8 
xxv) 2, 2-Dichloro -1, 1, 1 -Rifluoroethane  R-123 – C2HF 3Cl2 
xxvi)  1, 1, 1, 2, 3, 3, 3 -Heptafluoropropane  R-227a  3296  C3HF 7 
xxvii)  Isopentane  R-601a  1265  CH(CH 3)2CH 3 
xxviii)  Methylformate  R-611 – C2H4O2 
xxix)  Dichloromethane  R-30 – CH 2Cl2 
xxx) 1, 1-Dichloro -1-Fluoroethane  R-141b  – C2H3FCl 2  
 
Table 3 : Name of Low Pressure Refrigerant Gases (Flammable) With Chemical Formulae and UN 
Number  
[Clauses 3.1.2, 5.1 (b)] 
S/No.  Name of Refrigerant Gas  Refrigerant No.  UN No.  Chemical Symbol  
i) 1-Chloro -1,1-Difluoroethane  R-142B  2517  CH 3CClF 2 
ii) Difluoromethane (Methylene Fluoride)  R-32 3252  CH 2F2 
iii) Difluoethane (Ethylene Fluoride)  R-152a  1978  CH 3CHF 2 
iv) Ethyl  Chloride  R-160 1037  C2H5Cl 
v) 1, 1 Difluoroethane  R-152A  1030  C2H4F2 
vi) n – Butane  R-600a  1011  C4H10 
vii) 2, 3, 3, 3 -Tetrafluoro -1-Propane  R-1234YF  3161  C3H2F4 (CF 3CF = CH 2) 
viii) Trans -1, 3, 3, 3 -Tetrafluoro -1-Propane  R-1243za (E)  – CF 3CH = CHF  
ix) Trans -1, 3, 3, 3 -Tetrafluoro -Prop -1-Ene R-1234ze  3163  CF 3CH = CHF  
x) Propylene  R-1270  – C3H6 
xi) Chloromethane Methyl Chloride  R-40 1063  CH 3Cl 
xii) Diethylether  R-610 – C2H5OC 2H5 
 
Table 4 : Name of High Pressure Refrigerant Gases (Non Flammable) with Chemical Formulae and UN 
Number  
(Clause 3.1.2)  
S/No.  Name of Refrigerant Gas  Refrigerant No.  UN No.  Chemical Symbol  
i) Tetrafluoroethylene  R-1114  1081  C2F4 
ii) 1, 1-Difluoroethylene  R-1132a  1959  C2H2F2 
iii) SUVA’ Refrigerant 2, 2 -Dichloro -1, 1, 1 -Trifluoroethane  R-123 –  CHCl 2CF 3 
iv) Bromotrifluoromethane  R-13B1  1009  CBrF 3 
v) Tetrafluormethane (Carbon Tetrafluoride ) R-14 1982  CF 4 
vi) Trifluoromethane  R-23 1984  CHF 3 
vii) Hexafluoroethane  R-116 2193  C2F6 
viii) Vinyl Fluoride Inhibited/ Vinyl Fluoride  R-1141  1860  C2H3F 
ix) Pentafluoethane  R-125 3220  C2HF 5 
 
Table 5 : Name of High Pressure Refrigerant Gases (Flammable) with Chemical Formulae and UN 
Number  
(Clause 3.1.2 ) 
S/No.  Name of Refrigerant Gas  Refrigerant No.  UN No.  Chemical Symbol  
i) 1, 1, 1 -Trifluoroethane  R-143a  2035  CH 3CF 3 
ii) Trifluoro Ethane  R-143a  3163  C2H3F3 
iii) Fluoromethane  R-41 2454  CH 3F 
iv) 1, 1-Difluoroethylene (Vinyl)  R-1132a  1959  CH 2 = CF 2  
 
   MEDC 02 (2358) DTZS  
 
ICS: 23.020.30  
 
8 
 Table 6 : Name of Mixture Refrigerant Gases with Chemical Formulae and UN Number  
(Clause 3.1.2)  
Sl No.  Name of Refrigerant Gas  Refrigerant 
No.  UN No.  Chemical Symbol  
i)  Difluoromethane Pentafluoroethane 1, 1, 1, 2 -
Tetrafluoroethane R -32/125/134a  R-407D  1078  CH 2F2 (15 ± 2 percent), 
C2HF 5 (15 ± 2 percent), 
C2H2F4 (70 ± 2 percent)  
ii)  Octafluoropropane 1, 1, 1, 2 -Tetrafluoroethane Isobutane R -
218/134a/600a  R-413A  1078  C3F8 (9 ± 1 percent), C 2H2F4 
(88 ± 2 percent), C 4H10 (3 + 
0, – 1 percent  
iii)  Dichlorodifluoromethane, 1, 1, Difluoroethane R -12/152a  R-500  2602  CCl 2F2 (73.8 percent), 
C2H4F2 (26.2 percent)  
iv)  Trifluoromethane Hexafluoroethane R -23/116  R-508B  1078  CHF 3 (46 percent), C 2F6 (54 
percent)  
v)  Difluoromethane Pentafluoroethane 1, 1, 1, 2 – 
Tetrafluoroethane R/32/125/134a  R-407C  3163  CH 2F2 (23 ± 2 percent), 
C2HF 5 (25 ± 2 percent), 
C2H2F4 (52 ± 2percent)  
vi)  Chlorodifluoromethane Isobutane 1 -chloror -1, 1-
difluoroethane R -22/600a/142b  R-406A  1956  C4H10 (4 ± 1 percent), 
CHClF 2 (55 ± 2 percent), 
C2H3F2Cl (41 ± 0 percent)  
vii)  Difluoromethane Pentafluoroethane 1, 1, 1, 2 -
Tetrafluoroethane R -32/125/134a  R-407F  –  CH 2F2 (30 ± 2 percent), 
C2HF 5 (30 ± 2 percent), 
C2H2F4 (40 ± 2 percent)  
viii)  Difluoromethane Pentafluoroethane 1, 1, 1, 2 -
Tetrafluoroethane R -32/125/134a  R-407F  –  CH 2F2 (30 ± 2 percent), 
C2HF 5 (30 ± 2 percent), 
C2H2F4 (40 ± 2 percent)  
ix)  Propylene Chlorodifluoromethane 1, 1 -difluoroethane R -
1270/22/152a  R-411B  –  C3H6 (3 + 0, – 1 percent), 
CHClF 2 (94 + 2, – 0 percent, 
C2H4F2 (3 + 0, – 1 percent)  
x)  Propylene Chlorodifluoromethane 1, 1 -difluoroethane R -
1270/22/152a  R-411A  –  C3H6 (1.5 + 0, – 1 percent), 
CHClF 2 (87.5 + 2, – 0 
percent), C 2H4F2 (11 + 0, – 1 
percent  
xi)  Chlorodifluoromethane 1, 1 -difluoroethane 1 -Chloro -1, 1-
difluoroethane Octafluorocyclobutane R -22/152a/142b/RC -
318  R-405A  –  CHClF 2 (45 ± 0 percent) 
C2H4F2 (7 ± 1 percent), 
C2H3F2Cl (5.5 ± 1 percent) 
C4F8 (42.5 ± 2 percent)  
xii)  Pentafluoroethane, 1, 1, 1 – Trifluoroethane R -125/143a  R-507A  –  C2HF 5 (50 percent), C 2H3F3 
(50 percent)  
xiii)  Trifluoromethane, Hexafluoroethane  R-507B  1078  CHF 3, C 2F6  
xiv)  Chlorodifluoromethane 1, 1 -Difluoroethane 1 -Chloro -1, 1-
Difluoroethane Octafluorocyclobutane R -22/152a/142b/RC -
318  R-405A  –  CHClF 2 (45 ± 0 percent) 
C2H4F2 (7 ± 1 percent) 
C2H3F2Cl (5.5 ± 1 percent) 
C4F8 (42.5 ± 1 percent)  
xv)  Chlorodifluoromethane Oc tafluoropropane 1 -chloro -1, 1-
difluoroethane R22/R218/R142b  R-412A  –  CHClF 2 (70 ± 2 percent) 
C3F8 (5 ± 2 percent) 
C2H3F2Cl (25 ± 1 percent)  
xvi)  Difluoromethane Pentafluoroethane R32/R125  R-410B  –  CH 2F2 (45 ± 1 percent) 
C2HF 5 (55 ± 1 percent)  
xvii)  Chlorodifluoromethane 1, 1 -difluoroethane 2 -chloro -1, 1, 1, 2 -
tetrafluoroethane R22/R152a/R124  R-401C  –  CHClF 2 (33 ± 2 percent) 
C2H4F2 (15 ± 5, – 1.5 percent) 
C2HF 4Cl (52 ± 1 percent)  
xviii)  R-23/13 R -503 Pentafluoroethane, Trifluoromethane  R-503  2599  CHF 3 (40.1 percent) CClF 3 
(59.9 percent)  
xix)  Trifluoroethane Hexafluoroethane R -23/116  R-508A  1078  CHF 3 (39 percent) C 2F6 (61 
percent)  
xx)  R-509A R -22/218 Chlorodifluoromethane, Octafluoropropane  R-509A  1078  CHClF 2 (44 percent) C 3F8 
(56 percent)  
xxi)  Chlorodifluoromethane 2 -Chloro -1, 1, 1, 2 -Tetrafluoroethane 
Isobutane 1 -Chloro -1, 1-Difluoroethane R -22/124/600a/142b  R-414A  3163  CHClF 2 (51 ± 2 percent) 
C2HF 4Cl (28.5 ± 2 percent) 
C4H10 (4 ± 5 percent) 
C2H3F2Cl (16.5 + 5, – 1 
percent)  
xxii)  1, 1, 1, 2 -Tetrafluoroethane 2 -Chloro -1,1, 2 – 
Tetrafluoroethane Butane R -134a/124/600  R-416A  1078  C2H2F4 (59 + 5, – 1 percent 
C2HF 4Cl (39.5 + 1, – 5   MEDC 02 (2358) DTZS  
 
ICS: 23.020.30  
 
9 
 percent) C 4H10 (1.5 + 1, – 2 
percent)  
xxiii)  Chlorodifluoromethane 1, 1 -difluoroethane 2 -chloro -1, 1, 2, 2 -
tetrafluoroethane R -22/152a/124  R-401A  3163  CHClF 2 (53 ± 2 percent) 
C2H4F2 (13 + 5, – 1.5 
percent) C 2HF 4Cl (34 ± 1 
percent)  
xxiv)  Chlorodifluoromethane 1, 1 -difluoroethane 2 -chloro -1, 12, 2-
tetrafluoroethane R -22/152a/124  R-401B  3163  CHClF 2 (61 ± 2 percent) 
C2H4F2 (11 + 5, – 1.5 
percent) C 2HF 4Cl (28 ± 1 
percent)  
xxv)  Pentafluoroethane Propane Chlorodifluoromethane R -
125/290/22  R-402A  3163  C2HF 5 (60 ± 2 percent) C 3H8 
(2 ± 1 percent)  CHClF 2 (38 
± 2 percent)  
xxvi)  Pentafluoroethane (125) Propane Chlorodifluoroethane (22) 
R-125/290/22  R-402B  3163  C2HF 5 (38 ± 2 percent) C 3H8 
(2 ± 1 percent) CHClF 2 (60 
± 2 percent)  
xxvii)  Propane Chlorodifluoromethane Octafluoropropane R -
290/22/2 18  R-403A  –  C3H8 (5 ± 2.2 percent) 
CHClF 2 (75 ± 2 percent) 
C3H8 (20 ± 0 percent)  
xxviii)  Pentafluoroethane 1, 1, 1 -trifluoroethane 1, 1, 2 -
tetrafluoroethane R -125/143a/134a  R-404A  3337  C2HF 5 (44 ± 2 percent) 
C2H3F3 (52 ± 1 percent) 
C2H2F4 (4 ± 2 percent)  
xxix)  Chlorodifluoromethane Isobutane 1 -chloro -1, 1-difluoroethane 
R-22/600a/142b  R-406A  1078  CHClF 2 (55 ± 2 percent) 
C4H10 (4 ± 1 percent) 
C2H3F2Cl (4 ± 0 percent)  
xxx)  Difluoroethane Petrofluoroethane 1, 1, 1, 2 -Tetrafluoroethane 
R-32/125/134a  R-407A  3338  CH 2F2 (2 ± 2 percent) C 2HF 5 
(40 ± 2 percent) C 2H2F4 (40 
± 2 percent)  
xxxi)  Difluoromethane Pentafluoroethane 1, 1, 1, 2 -
tetrafluoroethane R -32/125/134a  R-407B  3339  CH 2F2 (10 ± 2 percent) 
C2HF 5 (70 ± 2 percent) 
C2H2F4 (20 ± 2 percent)  
xxxii)  Difluoromethane Pentafluoroethane 1, 1, 1, 2 -
tetrafluoroethane R -32/125/134a  R-407C  3340  CH 2F2 (23 ± 2 percent) 
C2HF 5(25 ± 2 percent) 
C2H2F4 (52 ± 2 percent)  
 Difluoromethane Pentafluoroethane 1, 1, 2 -tetrafluoroethane 
Tetrafluoroethane R -32/125/134a  R-407F  –  CH 2F2 (30 ± 2 percent) 
C2HF 5 (30 ± 2 percent) 
C2H2F4 (40 ± 2 percent)  
xxxiii)  Pentafluoroethane Trifluoroethane Chlorodifluoroethane R -
125/143a/22  R-408A  –  C2HF 5 (7 ± 2 percent) 
C2H3F3 (46 ± 1 percent) 
CHClF 2 (47 ± 2 percent)  
xxxiv)  Chlorodifluoromethane Chlorodifluoroethane 1 -chloro -1, 1-
difluoroethane R -22/142/142b  R-409A  3163  CHClF 2 (60 ± 2 percent) 
C2HF 4Cl (25 ± 2 percent) 
C2H3F2Cl (15 ± 1 percent)  
xxxv)  Chlorodifluoromethane 2 -chloro -1, 1, 1, 2 -tetrafluoroethane 1 -
chloro -1,1-difluoroethane R -22/124/142b  R-409B  –  CHClF 2 (65 ± 2 percent) 
C2HF 4Cl (25 ± 2 percent) 
C2H3F2Cl (10 ± percent)  
xxxvi)  Difluoromethane Pentafluoroeth ane R -32/125  R-410B  –  CH 2F2 (45 ± 1 percent) 
C2HF 5 (55 ± 1 percent)  
xxxvii)  1, 1, 1, 2 -tetrafluoroethane 2 -chloro -1, 1, 1, 2 -
tetrafluoroethane Butane R -134a/124/600  R-416A  1078  C2H2F4 (59 + 5, – 1 percent) 
C2HF 4Cl (39.5 + 1, – 5 
percent) C 4H10 (1.5 + 1, – 2 
percent)  
xxxviii)  1, 1, 1, 2 -tetrafluoroethane 1,1 -difluoroethane R -134a/152a  R-512A  –  C2H2F4 (5 percent) C 2H4F2 
(95 percent)  
xxxix)  Propane Dimethylether R -290/E170/  R-511A  –  C3H8 (95 ± 1 percent) C 2H6O 
(5 ± 1 percent)  
xl)  Dimethylether Isobutane R -E170/600a/  R-510A  –  C2H6O (88 ± 5 percent) 
C4H10 (12 ± 5 percent)  
xli)  Chlorodifluoromethane Octafluoropropane R -22/218  R-509A  1078  CHClF 2 (44 percent) C 3F8 
(56 percent)  
xlii)  Chlorodifluoromethane Chloropentafluoroeth ane R -22/115  R-502  1973  CHClF 2 (48.8 percent) 
C2F5Cl (51.2 percent)  
xliii)  Chlorodifluoromethane Dichlorodifluoromethane R -22/12  R-501  –  CHClF 2 (75 percent) CCl 2F2 
(25 percent)  
xliv)  Difluoromethane Pentafluoroethane 1, 1, 1, 2 -
tetrafluoroethane 1, 1 -difluoroethane Heptafluoropropane R -
32/125/134a/152a/227ea  R-442A  3163  CH 2F2 (31 percent) C 2HF 5 
(31 percent) C 2H2F4 (30 
percent) C 2H4F2 (3 percent)   MEDC 02 (2358) DTZS  
 
ICS: 23.020.30  
 
10 
 C2HF 7 (5 percent)  
xlv)  Ethane Propane Isobutane Butane R -170/290/600a/600  R-441A  –  C2H6 (3.1 ± 3 percent) C 3H8 
(54.8 ± 2 percent) C 4H10 
(42.1 ± 2.6 percent)  
xlvi)  Propane 1, 1, 1, 2 -tetrafluoroethane 1, 1 -difluoroethane R -
290/134a/152a  R-440A  –  C3H8 (6 ± 1 percent) C 2H2F4 
(1.6 ± 6 percent) C 2H4F2 
(97.8 ± 5 percent)  
xlvii)  Difluoromethane Pentafluoroethane Isobutane R -32/125/600a  R-439A  –  CH 2F2 (50 ± 1 percent) 
C2HF 5 (47 ± 1 percent) C 4H10 
(3 ± 5 percent)  
xlviii)  Difluoromethane Pentafluoroethane 1, 1, 1, 2 -
tetrafluoroethane Butane Isopentane R -32/125/134a/600/601a  R-438A  1078  CH 2F2 (8.5 ± 5, – 1.5 
percent) C 2HF 5 (45 ± 1.5 
percent) C 2H2F4 (44.2 ± 1.5 
percent) C 4H10 (1.7 + 1 – 2 
percent) C 5H12 (6 + 1, – 2 
percent )  
xlix)  Pentafluoroethane 1, 1, 1, 2 -tetrafluoroethane Butane Pentane 
R-125/134a/600/601  R-437A  3163  C2HF 5 (19.5 + 5, – 1.8 
percent) C 2H2F4 (78.5 + 1.5, 
– 7 percent) C 4H10 (1.4 + 1, – 
2 percent) C 5H12 (6 + 1, – 2 
percent)  
l)  Propane Isobutane R -290/600a  R-436B  –  C3H8 (52 ± 1 percent) C 4H10 
(48 + 1 percent)  
li)  Propane Isobutane R -290/600a  R-436A  –  C3H8 (56 ± 1 percent) C 4H10 
(44 ± 1 percent)  
lii)  Difluoromethane Chloropentafluoroethane R -32/115  R-504  –  CH 2F2 (48.2 percent) C 2F5Cl 
(51.8 percent)  
liii)  Dichlorodifluoromethane Chlorofluoromethane R -12/31  R-505  –  CCl 2F2 (78 percent) CH 2FCl 
(22 percent)  
liv)  Chlorofluoromethane 1, 2 -dichlorotetrafluoroethane R -31/114  R-506  –  CH 2FCl (55.1 percent) 
C2F4Cl2 (44.9 percent)  
lv)  Dimethylether 1, 1, 2 -difluoroethane R -E170/152a  R-435A  –  C2H6O (80 ± 1 percent) 
C2H4F2 (20 ± 1 percent)  
lvi)  Pentafluoroethane 1, 1, 1, 2 -trifluoroethane 1,1,1,2 -
tetrafluoroethane Isobutane R -125/143a/134a/600a  R-434A  3163  C2HF 5 (63.2 ± 1 percent) 
C2H3F3 (18 ± 1 percent) 
C2H2F4 (16 ± 1 percent) 
C4H10 (2.8 + 1, – 2 percent)  
lvii)  Propylene Propane R -1270/290  R-433C  –  C3H6 (25 ± 1 percent) C 3H8 
(75 ± 1 percent)  
lviii)  Propylene Propane R -1270/290  R-433B  –  C3H6 (5 ± 1 percent) C 3H8 
(95 ± 1 percent)  
lix)  Propylene Propane R -1270/290  R-433A  –  C3H6 (30 ± 1 percent) C 3H8 
(70 ± 1 percent)  
lx)  Propylene Dimethylether R -1270/E -170  R-432A  –  C3H6 (80 ± 1 percent) C 2H6O 
(20 ± 1 percent)  
lxi)  Propane 1, 1 -difluoroethane R -290/152a  R-431A  –  C3H8 (71 ± 1 percent) C 2H4F2 
(29 ± 1 percent)  
lxii)  1, 2-difluoroethane Isobutane R -152a/600a  R-430A  –  C2H4F2 (76 ± 1 percent) 
C4H10 (24 ± 1 percent)  
lxiii)  Dimethylether 1, 1 -difluoroethane Isobu tane R -
E170/152a/600a  R-429A  –  C2H6O (60 ± 1 percent) 
C2H4F2 (10 ± 1 percent) 
C4H10 (30 ± 1 percent)  
lxiv)  Pentafluoroethane 1,1,1 -trifluoroethane Propane Isobutane R -
125/143a/290/600a  R-428A  3163  C2HF 5 (77.5 ± 1 percent) 
C2H3F3 (20 ± 1 percent) C 3H8 
(6 + 1, – 2 percent) C 4H10 
(19 + 1, – 2 percent )  
lxv)  Difluoromethane Pentafluoroethane 1, 1, 1 -trifluoroethane 1, 
1, 1, 2 -tetrafluoroethane R -32/125/143a/134a  R-427A  3163  CH 2F2 (15 ± 2 percent) 
C2HF 5 (25 ± 2 percent) 
C2H3F3 (10 ± 2 percent) 
C2H2F4 (50 ± 2 percent)  
lxvi)  Pentafluoroethane 1, 1, 1, 2 -tetrafluoroethane Butane 
Isopentane R -125/134a/600/601a  R-426A  3163  C2HF 5 (5.1 ± 1 percent) 
C2H2F4 (93 ± 1 percent) 
C4H10 (1.3 + 1, – 2 percent) 
C5H12 (6 + 1, – 2 percent)  
lxvii)  Difluoromethane 1, 1, 1, 2 -tetrafluoroethane 1, 1, 1, 2, 3, 3, 3 -
hepafluoropropane R -32/134a/227ea  R-425A  –  CH 2F2 (18.5 + 5 percent) 
C2H2F4 (69.5 + 5 percent) 
C3HF 7 (12 + 5 percent)    MEDC 02 (2358) DTZS  
 
ICS: 23.020.30  
 
11 
 lxviii)  Pentafluoroethane 1, 1, 1, 2 -tetrafluoroethane Isobutane 
Butane R -125/134a/600a/600  R-424A  3163  C2HF 5 (50.5 ± 1 percent) 
C2H2F4 (47 ± 1 percent) 
C4H10 (1.9 + 3, – 1 percent) 
C5H12 (6 + 1, – 2 percent)  
lxix)  1, 1, 1, 2 -tetrafluoroethane 1, 1, 2, 2, 3, 3, 3 -
heptafluoropropane R -134a/227ea  R-423A  –  C2H2F4 (52.5 + 1 percent) 
C3HF 7 (47.5 + 1 percent)  
lxx)  Pentafluoroethane 1, 1, 1, 2 -Tetrafluoroethane Isobutane R -
125/134a/600a  R-422D  3163  C2HF 5 (65.1 + 9, – 1.1 
percent) C 2H2F4 (31.5 ± 1 
percent) C 4H10 (3.4 + 1, – 4)  
lxxi)  Pentafluoroethane 1, 1, 1, 2 -tetrafluoroethane Isobutane R -
125/134a/600a  R-422C  –  C2HF 5 (82 ± 1 percent) 
C2H2F4 (15 ± 1 percent) 
C4H10 (3 + 1, – 5 percent)  
lxxii)  1, 1, 1, 2 -2 Pentafluoroethane 1, 1, 1, 2 Tetrafluoroethane 
Isobutane R -125/134a/600a  R-422B  –  C2HF 5 (55 ± 1 percent) 
C2H2F4 (42 ± 1 percent) 
C4H10 (3 + 1, – 5 percent)  
lxxiii)  Pentafluoroethane 1, 1, 1, 2 -Tetrafluoroethane Isobutane R -
125/134a/600a  R-422A  –  C2HF 5 (85.1 ± 1 percent) 
C2H2F4 (11.5 ± 1 percent) 
C4H10 (3.4 + 1, – 4 perc ent)  
lxxiv)  Pentafluoroethane 1, 1, 1, 2 -tetrafluoroethane R -125/134a  R-421B  –  C2HF 5 (85 ± 1 percent) 
C2H2F4 (15 ± 1 percent)  
lxxv)  Pentafluoroethane 1, 1, 1, 2 -tetrafluoroethane R -125/134a  R-421A  1078  C2HF 5 (58 ± 1 percent) 
C2H2F4 (42 ± 1 percent)  
lxxvi)  1, 1, 1, 2 -tetrafluoroethane 1 -fluoro -1, 1-difluoroethane R -
134a/142b  R-420A  –  C2H2F4 (88 + 1, – 0 percent) 
C2H3F2Cl (12 + 0, – 1 
percent)  
lxxvii)  Pentafluoroethane 1, 1, 1, 2 -tetrafluoroethane Dimethylether 
R-125/134a/E170  R-419A  –  C2HF 5 (77 ± 1 percent) 
C2H2F4 (19 ± 1 percent) 
C2H6O (4 ± 1 percent)  
lxxviii)  Propane Chlorodifluoromethane 1, 1 -difluoroethane R -
290/22/152a  R-418A  –  C3H8 (1.5 ± 5 percent) 
CHClF 2 (96 ± 1 percent) 
C2H4F2 (2.5 ± 5 percent)  
lxxix)  Pentafluoroethane 1, 1, 1, 2 -tetrafluoroethane Butane R -
125/134a/600  R-417B  –  C2HF 5 (79 ± 1 percent) 
C2H2F4 (18.3 ± 1 percent) 
C4H10 (2.7 + 1, – 5 percent)  
lxxx)  Pentafluoroethane 1, 1, 1, 2 -tetrafluoroethane Butane R -
125/134a/600  R-417A  1078  C2HF 5 (46.6 ± 1 percent) 
C2H2F4 (50 ± 1 percent) 
C4H10 (3.4 + 1, – 4 percent)  
lxxxi)  Chlorodifluoromethane 1, 1 -difluoroethane R -22/152a  R-415B  –  CHClF 2 (25 ± 1 perce nt) 
C2H4F2 (75 ± 1 percent)  
lxxxii)  Chlorodifluoromethane 1, 1 -difluoroethane R -22/152a/  R-415A  –  CHClF 2 (82 ± 1 percent) 
C2H4F2 (18 ± 1 percent)  
lxxxiii)  Chlorodifluoromethane 2 -Chloro -1, 1, 1, 2 -Tetrafluoroethane 
Isobutane R -22/124/600a/142b 1 -Chloro -1, 1-difluoroethane  R-414B  3163  CHClF 2 (50 ± 2 percent) 
C2HF 4Cl (39 ± 2 percent) 
C4H10 (1.5 ± 5 percent) 
C2H3F2Cl (9.5 + 5, – 1 
percent)  
lxxxiv)  Chlorodifluoromethane 2 -chloro -1, 1, 1, 2 -tetrafluroethane 
Isobutane 1 -chlroro -1, 1-ifluoroethane R -22/124/600a/142b  R-414  –  CHClF 2 (51 ± 2 percent) 
C2HF 4Cl (28.5 ± 2 percent) 
C4H10 (4 ± 5 percent) 
C2H3F2Cl (16.5 + 5, – 1 
percent)  
lxxxv)  Octafluoropropane 1, 1, 1, 2 -tetrafluoroethane Isobutane R -
218/134a/600a  R-413A  1078  C3F8 (9 ± 1 percent) C 2H2F4 
(88 ± 2 percent) C 4H10 (3 + 
0, – 1 percent)  
lxxxvi)  Chlorodifluoromethane Octafluoropropane 1 -chloro -1, 1-
difluoroethane R -22/218/142b  R-412A  –  CHClF 2 (70 ± 2 percent) 
C3F8 (5 ± 2 percent) 
C2H3F2Cl (25 ± 1 percent)  
lxxxvii)  Difluoromethane Pentafluoroethane R -32/125  R-410A  3163  CH 2F2 (50 + 5, – 1.5 percent) 
C2HF 5 (50 + 1.5, – 5 percent)  
lxxxviii)  Difluoromethane Pentafluoroethane 1, 1, 1, 2 -tetrafluroethane 
R-32/125/134a  R-407E  –  CH 2F2 (25 ± 2 percent) 
C2HF 5 (15 ± 2 percent) 
C2H2F4 (60 ± 2 percent)  
lxxxix)  Difluoromethane Chloropentafluoroethane R -32/115  R-504  –  CH 2F2 (48.2 percent) C 2F3Cl 
(51.8 percent)  
xc)  Dichlorodifluoromethane Chlorofluoromethane R -12/31  R-505  –  CCl 2F2 (78 percent) CH 2FCl 
(22 percent)  
xci)  Chlorofluoromethane 1,2 -dichlorotetrafluoroethnae R -31/114  R-506  –  CH 2FCl (55.1 percent)   MEDC 02 (2358) DTZS  
 
ICS: 23.020.30  
 
12 
 C2F4Cl2 (44.9 percent)  
xcii)  Trifluoroethane Chlorotrifluoromethane R -23/13  R-503  –  CHF 3 (40.1 percent) CClF 3 
(59.9 percent)  
NOTE — Certain Refrigerant gas mixtures have not been allotted UN Numbers.  
 
Table 7 Cylinder Colours Identification (Other Than Refrigerant Gases)  
(Clauses 4.1 and 4.5) 
S/No.  Name of Gas  Ground Colour  Colour Shade 
No./RAL No.  Colour of 
Shoulder  Colour Shade 
No./RAL No.  Colour of 
Band  RAL No.  
i)  Acetylene  Maroon (541)  RAL 3009  Ground colour  RAL 3009  –  –  
ii)  Air  French grey (630)  C. S. 630  Ground colour  C. S. 630  –  –  
iii)  Ammonia  Graphite Black  RAL 9011  Signal red 
(537)  RAL 3001  Golden yellow 
(356)  RAL 1004  
iv)  Argon  Peacock blue 
(103)  C. S. 103  Ground colour  C. S. 103  –  –  
v)  Butane  Signal red (537)  RAL 3001  Signal red 
(537)  RAL 3001  –  –  
vi)  Carbon dioxide  Graphite Black  RAL 9011  White or 
Aluminium 
paint  RAL 9006  Graphite Black  RAL 9011  
vii)  Carbon 
monoxide  Signal red (537)  RAL 3001  Golden 
yellow (356)  RAL 1004  Signal red (537)  RAL 3001  
viii)  Chlorine  Golden yellow 
(356)  RAL 1004  Ground colour  RAL 1004  –  –  
ix)  CNG  White  RAL 9003  White  RAL 9003    
x)  Coal gas  Signal red (537)  RAL 3001  Ground colour  RAL 3001  –  –  
xi)  Ethyl chloride  French grey (630)  C.S. 630  Signal red 
(537)  RAL 3001  –  –  
xii)  Ethylene  Dark violet (796)  RAL 4011  Signal red 
(537)  RAL 3001  Signal Yellow  RAL 1003  
xiii)  Ethylene oxide  Dark violet (796)  RAL 4011  Signal red 
(537)  RAL 3001  Golden yellow 
(356)  RAL 1004  
xiv)  Helium  Middle brown 
(411)  C. S. 411  Ground colour  C. S. 411  –  –  
xv)  Hydrogen 
cyanide  Peacock blue 
(103)  C. S. 103  Ground colour  C. S. 103  Golden yellow 
(356)  RAL 1004  
xvi)  Hydrogen  Signal red (537)  RAL 3001  Ground colour  RAL 3001  –  –  
xvii)  Liquefied 
petroleum gas 
(LPG)  Signal red (537)  RAL 3001  Ground colour  RAL 3001  –  –  
xviii)  Methane  White  RAL 9003  Signal Red 
(537)  RAL 3001  –  –  
xix)  Methyl bromide  Peacock blue 
(103)  C.S. 103  Graphite 
Black  RAL 9011  Grass Green  RAL 6010  
xx)  Methyl chloride  Light Brunswick 
green (225)  C.S. 225  Signal red 
(537)  RAL 3001  Signal Yellow  RAL  
1003  
xxi)  Neon  Middle brown 
(411)  C.S. 411  Graphite 
Black  RAL 9011  Signal Blue  RAL 5005  
xxii)  Nitrogen  French grey (630)  C.S. 630  Graphite 
Black  RAL 9011  Bottle Green  RAL 6007  
xxiii)  Oxygen  Graphite Black  RAL 9011  Ground colour  RAL 9011  –  –  
xxiv)  Phosgene  Graphite Black  RAL 9011  Peacock blue 
(103)  RAL 1004  Golden yellow 
(356)  RAL  
1004  
xxv)  Propane  Signal red (537)  RAL 3001  Ground colour  RAL 3001  –  –  
xxvi)  Sulphur dioxide  Light Brunswick 
green (225)  C.S. 225  Golden 
yellow (356)  RAL 1004  Signal Black  RAL 9004  
NOTES  
1 Colour shades have been taken from either of the two Standards – I) CS (Colour Shade) Designated from IS 5 and II) RAL: from RAL 
colour Standard.  
2 For Aluminium cylinders – Refer to clause 4.  
   MEDC 02 (2358) DTZS  
 
ICS: 23.020.30  
 
13 
 Table 8 Cylinder Colours Identification of Refrigerant Gases  (Low Pressure – Non Flammable)  
(Clause 4.2) 
S/No.  Name of Gas  Ground 
Colour  Colour 
Shade 
No./RAL No.  Colour of 
Shoulder  Colour 
Shade 
No./RAL No.  Colour 
of Band  RAL 
No.  
i)  Trichloromonofluoromethane R -11  
FRENCH 
GREY 
(630)  C S 630  DARK 
VIOLET 
(796)  RAL 4011  – – ii)  Octafluoropropane R -218  
iii)  Vinyl Fluoride R -141  
iv)  Dibromotetrafluoro - Ethane R -114b2  
v)  Dichlorodifluoromethane R -12  
vi)  Bromochlorodifluoro Methane R -12b1  
vii)  Chlorotrifluoromethane R -13  
viii)  Dichlorofluoromethane R -21  
ix)  Trichlorotrifluoroethane R -113  
x)  Dichlorotetra -Fluoroethane R -114  
xi)  Chloropentafluoroethane R -115  
xii)  Chlorotetrafluoroethane R -124  
xiii)  Octafluorocyclobutane R -C318  
xiv)  Hexafluoropropene R -1216  
xv)  Ethyl Methyl Ether R -227  
xvi)  R-134A 1, 1, 1, 2 -Tetrafluoroethane  - R-
134a  
xvii)  Trichlorotrifluoroethane R-113a  
xviii)  Chlorotrifluoroethane  R-133a  
xix)  Fluoroethane - R-161  
xx)  Chlorodifluoromethane R -22  
xxi)  1, 1, 1, 3, 3 -Hexafluoropropane R-236fa  
xxii)  1, 1, 1, 3, 3 – Pentafluoropropane  R-245fa  
xxiii)  1, 1, 1, 2, 3, 3, 3 -Heptafluoropropane R-
227ea  
xxiv)  1, 2-Dichloro -1,1,2 -Trifluoroethane R-123a  
xxv)  Octafluoropropane R -218  
xxvi)  2,2-Dichloro -1,1,1 -Trifluoroethane R -123  
xxvii)  1, 1, 1, 2, 3, 3, 3 -Heptafluoropropane  R-
227a  
xxviii)  Isopentane  R-601a  
xxix)  Methylformate R -611  
xxx)  Dichloromethane R -30  
xxxi)  1, 1-Dichloro -1-Fluoroethane R-141b  
 
 
 
 
 
 
 
 
 
 
   MEDC 02 (2358) DTZS  
 
ICS: 23.020.30  
 
14 
 Table 9 Cylinder Colours Identification of Refrigerant Gases (High Pressure – Non Flammable)  
(Clause 4.2) 
S/No.  Name of Gas  Ground 
Colour  Colour Shade 
No./Ral No.  Colour of 
Shoulder  Colour Shade 
No./Ral No.  Colour of 
Band  Ral No.  
i)  1-Chloro -1, 1-Difluoroethane R -
142b  
FRENCH 
GREY 
(630)  C S 630  DARK 
VIOLET 
(796)  RAL 4011  SIGNAL 
RED (537)  RAL 
3001  ii)  Difluoromethane (Methylene 
Fluoride) R -32  
iii)  Difluoethane (Ethylene Fluoride) 
R-152a  
iv)  Ethyl Chloride R -160  
v)  1, 1 Difluoroethane R -152a  
vi)  N - Butane  R-600a  
vii)  2, 3, 3, 3 -Tetrafluoro -1- Propane 
R-1234yf  
viii)  Trans -1,3,3,3 - Tetrafluoro -1-
Propane  R-1243za( E)  
ix)  Trans -1,3,3,3 - Tetrafluoro -Prop -1-
Ene R-1234ze  
x)  Propylene R -1270  
xi)  Chloromethane Methylchloride R -
40  
xii)  Diethylether R -610  
 
Table 10 Cylinder Colours Identification of Refrigerant Gases (Low Pressure – Flammable)  
(Clause 4.2) 
S/No.  Name of Gas  Ground 
Colour  Colour Shade 
No./RAL No.  Colour of 
Shoulder  Colour Shade 
No./RAL No.  Colour of 
Band  RAL 
No.  
i)  Tetrafluoroethylene R -1114  
FRENCH 
GREY 
(630)  C S 630  GROUND 
COLOUR  C S 630  – – ii)  1, 1-Difluoroethylene  R-1132a  
iii)  Suva’ Refrigerant 2,2 - Dichloro -1,1, 1 -
Trifluoroethane R -123  
iv)  Bromotrifluoromethane R -13b1  
v)  Tetrafluormethane (Carbon 
Tetrafluoride) R -14  
vi)  Trifluoromethane R -23  
vii)  Hexafluoroethane R -116  
viii)  Vinyl Fluoride Inhibited/Vinyl Fluoride 
R-1141  
ix)  Pentafluoethane R -125  
 
Table 11 Cylinder Colours Identification of Refrigerant Gases (High Pressure – Flammable)  
(Clause 4.2) 
S/No.  Name of Gas  Ground 
Colour  Colour Shade 
No./Ral No.  Colour of 
Shoulder  Colour Shade 
No./Ral No.  Colour of 
Band  Ral No.  
i)  1, 1, 1 – Trifluoroethane  R-143a  
FRENCH 
GREY 
(630)  C S 630  GROUND 
COLOUR  C S 630  SIGNAL 
RED (537)  RAL 
3001  ii)  Trifluoro Ethane R-143a  
iii)  Fluoromethane R -41  
iv)  1,1-Difluoroethylene (Vinyl) R-
1132a  
 
 
   MEDC 02 (2358) DTZS  
 
ICS: 23.020.30  
 
15 
 Table 12 Colour Identification of Specific Gas Mixtures  
(Clause 4.4) 
S/No.  Gas Mixture (with More 
than 50 percent of the 
First Named Gas)  Ground 
Colour  Colour Shade 
No./RAL No.  Colour 
of 
Shoulder  Colour 
Shade 
No./RAL No.  Colour of 
Band  Colour Shade 
No./RAL No.  
i)  Argon and Carbon dioxide  Peacock Blue 
(103)  C.S. 103  Ground 
colour  C.S. 103  Light 
Brunswick 
Green 
(225)  C.S. 225  
ii)  Hydrogen and Nitrogen  Red (537)  RAL 3001  Ground 
colour  RAL3001  Grey (530)  C.S. 530  
iii)  Nitrogen and Oxygen  French Grey 
(630)  C.S. 630  Graphite 
Black  RAL 9011  Graphite 
Black  RAL 9011  
iv)  Nitrogen and Carbon 
dioxide  French Grey 
(630)  C.S. 630  Graphite 
Black  RAL 9011  Light 
Brunswick 
Green 
(225)  C.S. 225  
v)  Air and Carbon dioxide  French Grey 
(630)  C.S. 630  Ground 
colour  C.S. 630  Light 
Brunswick 
Green (225  C.S. 225  
vi)  Argon and Oxygen  Peacock Blue 
(103)  C.S. 103  Ground 
colour  C.S. 103  Graphite 
Black  RAL 9011  
vii)  Argon and Nitrogen  Peacock Blue 
(103)  C.S. 103  Peacock 
Blue 
(103)  C.S. 103  French 
Grey (630)  C.S. 630  
NOTES  
1 Colour shades have been taken from either of the two Standards – I) CS (Colour Shade) designated from IS 5 and II) RAL: from RAL  
colour Standard.  
2 Body colour band shall be painted round the cylinder midway between the base and neck and  shall have a width equal to one -fifth of  
the total length of the cylinder.  
3 For Aluminium cylinders – see 5.  
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
   MEDC 02 (2358) DTZS  
 
ICS: 23.020.30  
 
16 
 Table 13 Colour Identification of Gases and Gas Mixtures  
(Clause 4.5) 
Sl No.  Nature of Gas 
or Mixture  Ground Colour 
of Cylinder Shell 
(See Notes below)  Colour Shade 
No./RAL No.  Colour of 
Shoulder  Colour Shade 
No./RAL No.  Colour of 
Band  Colour Shade 
No./RAL No.  
i)  Non-
Inflammable 
and non -
poisonous  White  RAL 9003  Signal Grey  RAL 7004  Signal Orange  RAL 2010  
ii)  Non-
Inflammable 
and poisonous  White  RAL 9003  Golden 
yellow  CS 356/RAL 
1004  Signal Blue  RAL 5005  
iii)  Flammable and 
non-poisonous  White  RAL 9003  Signal red  CS 537/RAL 
3001  Signal Grey  RAL 7004  
iv)  Flammable and 
poisonous  White  RAL 9003  Signal red 
and Golden 
yellow  CS 537/RAL 
3001  Leaf  
Green  RAL 6002  
v)  Gas mixture 
(not covered in 
this standard)  Graphite Black 
(Major Gas 
Colour)  RAL 9011  Ground 
Colour  RAL 9011  Golden 
Yellow Band 
with apprx. 
1/5th of the 
Cylinder 
Length  CS 356/RAL 
1004  
NOTES  
1 Cylinders intended for gas mixtures shall be marked with the words “Gas Mixture” or “Mixed Gas” and in addition, the cylinder s shall be 
marked with the names (symbols, if necessary) of the com ponents of the mixture by stamping, if the cylinders are intended for the 
permanent use of the particular gas mixture, or by painting, if the cylinders are intended for the casual use of the particul ar gas mixture.  
2 No person shall in any way interfere w ith or change the colour painted on a gas cylinder: Provided that nothing in this sub -rule shall be 
deemed to prohibit the re -paining of a cylinder with the identification colour painted on it when it is required for the maintenance of the 
cylinder or when  a cylinder is converted from one gas service to another gas service in accordance with these Standards.  
3 Colour shades have been taken from either of the two Standards – I) CS (Colour Shade) designated from IS 5 and II) RAL: from RAL 
colour Standard.  
4 Only colours having reflectance of munsell value not less than 6 should be used.  
5 Paints which contain aluminium that constitutes a fire risk should not be used.  
6 For Aluminium cylinders – See 5.  
7 See Annex A for RAL color code and corresponding shade. 
 
 
 
 
 
 
 
 
 
 
 
 
 
   MEDC 02 (2358) DTZS  
 
ICS: 23.020.30  
 
17 
 ANNEX A  
(Clause Table 13)  
RAL COLOR CODE AND CORRESPONDING SHADE  
  MEDC 02 (2358) DTZS  
 
ICS: 23.020.30  
 
18 
  
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
  MEDC 02 (2358) DTZS  
 
ICS: 23.020.30  
 
19 
  
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
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