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Benzyl chloride																				Related Pages
										May 1994
Immediately Dangerous to Life or Health Concentrations (IDLH)
**CAS number:** 100–44–7
**NIOSH REL:** 1 ppm (5 mg/m3) 15­minute CEILING
**Current OSHA PEL:** 1 ppm (5 mg/m3) TWA
**1989 OSHA PEL:** Same as current PEL
**1993­1994 ACGIH TLV:** 1 ppm (5.2 mg/m3) TWA
**Description of Substance:** Colorless to slightly yellow liquid with a pungent, aromatic odor.
**LEL:** . . . 1.1% (10% LEL, 1,100 ppm)
**Original (SCP) IDLH:** 10 ppm
**Basis for original (SCP) IDLH:** Very little data are available on the acute effects of exposure to benzyl chloride. ACGIH [1971] reported that in 1 minute an exposure to 16 ppm is intolerable to man [Flury and Zernik 1931]. ILO [1972] reported that 20 ppm will render the atmosphere irrespirable in 1 minute. ILO [1971] reported that 50 to 100 mg/m3 (10 to 19 ppm) immediately causes weeping and twitching of the eyelids, while 160 mg/m3 (30 ppm) causes effects that are intolerable to the eyes and nasal mucous membranes. Based on this data, an IDLH of 10 ppm is assumed in order to avoid difficulties in escape in the event of respirator failure.
**Short­term exposure guidelines:** None developed
**ACUTE TOXICITY DATA**
**Lethal concentration data:**

**Species**
**Reference**
**LC50****(ppm)**
**LCLo****(ppm)**
**Time**
**Adjusted 0.5-hr****LC (CF)**
**Derived****value**RatMouse
Dog
IARC 1976IARC 1976
NIOSH 1978
15080
—–
———-
380
2 hr2 hr
8 hr
240 ppm (1.6)128 ppm (1.6)
950 ppm (2.5)
24 ppm13 ppm
95 ppm
**Other animal data:** RD50 (mouse), 17 ppm [DeCeaurriz et al. 1981].
**Human data:** It has been reported that an exposure to 16 ppm for 1 minute is intolerable [Flury and Zernik 1931]. It has also been reported that 10 to 19 ppm immediately causes weeping and twitching of the eyelids [ILO 1971].

**Species**
    **Reference**
    **LC50** **(ppm)**
    **LCLo** **(ppm)**
    **Time**
    **Adjusted 0.5-hr** **LC (CF)**
    **Derived** **value**Rat MouseDog
    IARC 1976 IARC 1976NIOSH 1978
    150 80-----
    ----- -----380
    2 hr 2 hr8 hr
    240 ppm (1.6) 128 ppm (1.6)950 ppm (2.5)
    24 ppm 13 ppm95 ppm
 **Other animal data:** RD50 (mouse), 17 ppm [DeCeaurriz et al. 1981].
 **Human data:** It has been reported that an exposure to 16 ppm for 1 minute is intolerable [Flury and Zernik 1931]. It has also been reported that 10 to 19 ppm immediately causes weeping and twitching of the eyelids [ILO 1971].
 
 **Revised IDLH:** 10 ppm [Unchanged] **Basis for revised IDLH:** Based on acute inhalation toxicity data in humans [Flury and Zernik 1931; ILO 1971], the original IDLH for benzyl chloride (10 ppm) is not being revised at this time.
**REFERENCES:**
1. ACGIH [1971]. Benzyl chloride. In: Documentation of the threshold limit values for substances in workroom air. 3rd ed. Cincinnati, OH: American Conference of Governmental Industrial Hygienists, p. 24.
2. DeCeaurriz JC, Micillino JC, Bonnet P, Guenier JP [1981]. Sensory irritation caused by various industrial airborne chemicals. Toxicol Lett *9*(2):137­143.
3. Flury F, Zernik F [1931]. Sch@dliche gase d@mpfe, nebel, rauch­ und staubarten. Berlin, Germany: Verlag von Julius Springer, p. 339 (in German).
4. IARC [1976]. IARC monographs on the evaluation of the carcinogenic risk of chemicals to man: benzyl chloride. Vol. 11. Lyon, France: World Health Organization, International Agency for Research on Cancer, p. 217.
5. ILO [1971]. Benzyl chloride. In: Encyclopaedia of occupational health and safety. 2nd ed. Vol. I (A­K). Geneva, Switzerland: International Labour Office, pp. 169­170.
6. ILO [1972]. Toluene and derivatives. In: Encyclopaedia of occupational health and safety. Vol. II (L­Z). 2nd ed. Geneva, Switzerland: International Labour Office, pp. 1414­1415.
7. NIOSH [1978]. NIOSH criteria for a recommended standard: occupational exposure to benzyl chloride. Cincinnati,OH: U.S. Department of Health, Education, and Welfare, Public Health Service, Center for Disease Control, National Institute for Occupational Safety and Health, DHEW (NIOSH) Publication No. 78­182.

			
							
								Page last reviewed:  December 4, 2014						Content
							source: 	National Institute for Occupational Safety and Health NIOSH Publications & Products
Immediately Dangerous To Life or Health (IDLH) Values
Table of IDLH Values
Criteria for Determining IDLH Values
Historical Documentation
Original (SCP) Values
Abbreviations for IDLH Documentation
Abbreviations for Journal Titles Follow NIOSH Facebook
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