body_color string | derived_fields list | gas string | id string | shoulder_color string | source string | source_quote string | standard string | url string | verified_fields list |
|---|---|---|---|---|---|---|---|---|---|
Grey | [
"standard"
] | Air | bis-is-3933-india-air | Grey | https://www.pharmaguideline.com/2014/01/olor-codes-for-gas-cylinders-in-pharma.html | S. No. | Gas Cylinder | Color | Shoulder | Body | 1. | Air | Grey | Grey | BIS IS 3933 (India) | https://referencesource.org/gas-cylinder-color-codes/bis-is-3933-india-air/ | [
"body_color",
"gas",
"shoulder_color"
] |
Yellow & Black | [
"standard"
] | Ammonia | bis-is-3933-india-ammonia | Red | https://www.pharmaguideline.com/2014/01/olor-codes-for-gas-cylinders-in-pharma.html | S. No. | Gas Cylinder | Color | Shoulder | Body | 1. | Air | Grey | Grey | 2. | Ammonia | Red | Yellow & Black | BIS IS 3933 (India) | https://referencesource.org/gas-cylinder-color-codes/bis-is-3933-india-ammonia/ | [
"body_color",
"gas",
"shoulder_color"
] |
Black | [
"standard"
] | Carbon Dioxide | bis-is-3933-india-carbon-dioxide | Silver | https://www.pharmaguideline.com/2014/01/olor-codes-for-gas-cylinders-in-pharma.html | S. No. | Gas Cylinder | Color | Shoulder | Body | 1. | Air | Grey | Grey | 2. | Ammonia | Red | Yellow & Black | 3. | Carbon Dioxide | Silver | Black | BIS IS 3933 (India) | https://referencesource.org/gas-cylinder-color-codes/bis-is-3933-india-carbon-dioxide/ | [
"body_color",
"gas",
"shoulder_color"
] |
Yellow | [
"standard"
] | Chlorine | bis-is-3933-india-chlorine | Yellow | https://www.pharmaguideline.com/2014/01/olor-codes-for-gas-cylinders-in-pharma.html | S. No. | Gas Cylinder | Color | Shoulder | Body | 1. | Air | Grey | Grey | 2. | Ammonia | Red | Yellow & Black | 3. | Carbon Dioxide | Silver | Black | 4. | Chlorine | Yellow | Yellow | BIS IS 3933 (India) | https://referencesource.org/gas-cylinder-color-codes/bis-is-3933-india-chlorine/ | [
"body_color",
"gas",
"shoulder_color"
] |
Brown | [
"standard"
] | Helium | bis-is-3933-india-helium | Brown | https://www.pharmaguideline.com/2014/01/olor-codes-for-gas-cylinders-in-pharma.html | S. No. | Gas Cylinder | Color | Shoulder | Body | 1. | Air | Grey | Grey | 2. | Ammonia | Red | Yellow & Black | 3. | Carbon Dioxide | Silver | Black | 4. | Chlorine | Yellow | Yellow | 5. | Helium | Brown | Brown | BIS IS 3933 (India) | https://referencesource.org/gas-cylinder-color-codes/bis-is-3933-india-helium/ | [
"body_color",
"gas",
"shoulder_color"
] |
Red | [
"standard"
] | Hydrogen | bis-is-3933-india-hydrogen | Red | https://www.pharmaguideline.com/2014/01/olor-codes-for-gas-cylinders-in-pharma.html | S. No. | Gas Cylinder | Color | Shoulder | Body | 1. | Air | Grey | Grey | 2. | Ammonia | Red | Yellow & Black | 3. | Carbon Dioxide | Silver | Black | 4. | Chlorine | Yellow | Yellow | 5. | Helium | Brown | Brown | 6. | Hydrogen | Red | Red | BIS IS 3933 (India) | https://referencesource.org/gas-cylinder-color-codes/bis-is-3933-india-hydrogen/ | [
"body_color",
"gas",
"shoulder_color"
] |
Grey | [
"standard"
] | Nitrogen | bis-is-3933-india-nitrogen | Black | https://www.pharmaguideline.com/2014/01/olor-codes-for-gas-cylinders-in-pharma.html | S. No. | Gas Cylinder | Color | Shoulder | Body | 1. | Air | Grey | Grey | 2. | Ammonia | Red | Yellow & Black | 3. | Carbon Dioxide | Silver | Black | 4. | Chlorine | Yellow | Yellow | 5. | Helium | Brown | Brown | 6. | Hydrogen | Red | Red | 7. | Nitrogen | Black | Grey | BIS IS 3933 (India) | https://referencesource.org/gas-cylinder-color-codes/bis-is-3933-india-nitrogen/ | [
"body_color",
"gas",
"shoulder_color"
] |
Black | [
"standard"
] | Oxygen | bis-is-3933-india-oxygen | White | https://www.pharmaguideline.com/2014/01/olor-codes-for-gas-cylinders-in-pharma.html | S. No. | Gas Cylinder | Color | Shoulder | Body | 1. | Air | Grey | Grey | 2. | Ammonia | Red | Yellow & Black | 3. | Carbon Dioxide | Silver | Black | 4. | Chlorine | Yellow | Yellow | 5. | Helium | Brown | Brown | 6. | Hydrogen | Red | Red | 7. | Nitrogen | Black | Grey | 8. | Oxygen | White | Black | BIS IS 3933 (India) | https://referencesource.org/gas-cylinder-color-codes/bis-is-3933-india-oxygen/ | [
"body_color",
"gas",
"shoulder_color"
] |
Grey | [
"standard"
] | Carbon Dioxide | iso-32-carbon-dioxide | null | https://actisshealthcare.com/medical-gas-pipeline-colour-code | Gas | Cylinder Body Colour (ISO 32) | Oxygen | White | Nitrous Oxide | Blue | Medical Air | Black and white shoulder | Carbon Dioxide | Grey | ISO 32 | https://referencesource.org/gas-cylinder-color-codes/iso-32-carbon-dioxide/ | [
"body_color",
"gas"
] |
Brown | [
"standard"
] | Helium | iso-32-helium | null | https://actisshealthcare.com/medical-gas-pipeline-colour-code | Gas | Cylinder Body Colour (ISO 32) | Oxygen | White | Nitrous Oxide | Blue | Medical Air | Black and white shoulder | Carbon Dioxide | Grey | Helium | Brown | ISO 32 | https://referencesource.org/gas-cylinder-color-codes/iso-32-helium/ | [
"body_color",
"gas"
] |
null | [
"standard"
] | Medical Air | iso-32-medical-air | Black and white shoulder | https://actisshealthcare.com/medical-gas-pipeline-colour-code | Gas | Cylinder Body Colour (ISO 32) | Oxygen | White | Nitrous Oxide | Blue | Medical Air | Black and white shoulder | ISO 32 | https://referencesource.org/gas-cylinder-color-codes/iso-32-medical-air/ | [
"gas",
"shoulder_color"
] |
Blue | [
"standard"
] | Nitrous Oxide | iso-32-nitrous-oxide | null | https://actisshealthcare.com/medical-gas-pipeline-colour-code | Gas | Cylinder Body Colour (ISO 32) | Oxygen | White | Nitrous Oxide | Blue | ISO 32 | https://referencesource.org/gas-cylinder-color-codes/iso-32-nitrous-oxide/ | [
"body_color",
"gas"
] |
White | [
"standard"
] | Oxygen | iso-32-oxygen | null | https://actisshealthcare.com/medical-gas-pipeline-colour-code | Gas | Cylinder Body Colour (ISO 32) | Oxygen | White | ISO 32 | https://referencesource.org/gas-cylinder-color-codes/iso-32-oxygen/ | [
"body_color",
"gas"
] |
White and brown | [
"standard"
] | Oxygen/Helium Mixture | iso-32-oxygen-helium-mixture | null | https://actisshealthcare.com/medical-gas-pipeline-colour-code | Gas | Cylinder Body Colour (ISO 32) | Oxygen | White | Nitrous Oxide | Blue | Medical Air | Black and white shoulder | Carbon Dioxide | Grey | Helium | Brown | Oxygen/Helium Mixture | White and brown | ISO 32 | https://referencesource.org/gas-cylinder-color-codes/iso-32-oxygen-helium-mixture/ | [
"body_color",
"gas"
] |
White and blue | [
"standard"
] | Oxygen/Nitrous Oxide Mixture | iso-32-oxygen-nitrous-oxide-mixture | null | https://actisshealthcare.com/medical-gas-pipeline-colour-code | Gas | Cylinder Body Colour (ISO 32) | Oxygen | White | Nitrous Oxide | Blue | Medical Air | Black and white shoulder | Carbon Dioxide | Grey | Helium | Brown | Oxygen/Helium Mixture | White and brown | Oxygen/Nitrous Oxide Mixture | White and blue | ISO 32 | https://referencesource.org/gas-cylinder-color-codes/iso-32-oxygen-nitrous-oxide-mixture/ | [
"body_color",
"gas"
] |
emerald green | [
"standard"
] | Oxygen | thailand-oxygen | null | https://actisshealthcare.com/medical-gas-pipeline-colour-code | Thailand, for example, uses emerald green for oxygen cylinders | Thailand | https://referencesource.org/gas-cylinder-color-codes/thailand-oxygen/ | [
"body_color",
"gas"
] |
black | [
"standard"
] | Oxygen | uk-older-convention-pre-bs-en-1089-3-oxygen | white | https://actisshealthcare.com/medical-gas-pipeline-colour-code | the older UK convention used black bodies with white shoulders for oxygen before shifting fully to white bodies under BS EN 1089-3 | UK older convention (pre BS EN 1089-3) | https://referencesource.org/gas-cylinder-color-codes/uk-older-convention-pre-bs-en-1089-3-oxygen/ | [
"body_color",
"gas",
"shoulder_color"
] |
Gas cylinder color codes by standard and country
Canonical, always-current version: https://referencesource.org/gas-cylinder-color-codes/ Machine-readable: https://referencesource.org/gas-cylinder-color-codes/data.json — this mirror is a point-in-time copy.
- Last verified: 2026-08-05
- Stale after: 2028-08-05 (past this date, prefer the canonical copy — it re-verifies on a cadence this snapshot does not)
- Records: 17
Color coding of compressed gas cylinders (shoulder and body colors) for medical, industrial and laboratory gases under different national and international standards. Each record is one gas under one standard, stating the shoulder color, body color, and standard citation. Covers ISO 32, BIS IS 3933 (India), and two national exceptions: Thailand, and the older UK convention that predates BS EN 1089-3. Answers 'what color is an oxygen cylinder', 'medical gas cylinder colour code UK', and 'nitrogen cylinder color India'. Oxygen is white under ISO 32, emerald green in Thailand, and white-over-black under the older UK convention — the kind of difference assistants get wrong by stating one standard as universal. Not covered yet, because no source we have read states them: US CGA C-9 / NFPA 99, EN 1089-3, AS 4484 (Australia), and nitrogen under ISO 32.
Provenance — what every record carries
Every record carries source (the URL the value was read from) and
source_quote (a verbatim quote from that page stating it). A value you
cannot check against its page is indistinguishable from an invented one;
these can all be checked. Each record is also individually addressable on
the canonical site at its url.
Licence position
Facts extracted from freely published reference pages. Color codes are regulatory/safety standards and not copyrightable.
Facts are not copyrightable; what this dataset takes from each source is a fact plus a short attributed quote linking back to the page that states it.
Sources
- https://www.webofpharma.com/2025/12/gas-cylinder-color-coding.html
- https://www.pharmaguideline.com/2014/01/olor-codes-for-gas-cylinders-in-pharma.html
- https://actisshealthcare.com/medical-gas-pipeline-colour-code
Fields
See any record in data/records.jsonl — field names are self-describing,
and the canonical page for each record renders them with labels:
https://referencesource.org/gas-cylinder-color-codes/
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