Agent Name

alpha-Hexachlorocyclohexane

CAS Number

319-84-6

Formula

C6-H6-Cl6

Major Category

Pesticides

Synonyms

1a,2a,3b,4a,5b,6b-Hexachlorocyclohexane; Benzene hexachloride-alpha-isomer; Benzenehexachloride-alpha-isomer; Cyclohexane, 1,2,3,4,5,6-hexachloro-, alpha-; Cyclohexane, 1,2,3,4,5,6-hexachloro-, alpha-isomer; Hexachlorcyclohexan [German]; alpha-1,2,3,4,5,6-Hexachlorocyclohexane; alpha-BHC; alpha-Benzene hexachloride; alpha-Benzenehexachloride; alpha-HCH; alpha-Hexachloran; alpha-Hexachlorane; alpha-Lindane; (1alpha,2alpha,3beta,4alpha,5beta,6beta)-1,2,3,4,5,6-Hexachlorocyclohexane; Cyclohexane, 1,2,3,4,5,6-hexachloro-, (1alpha,2alpha,3beta,4alpha,5beta,6beta)-; [ChemIDplus] UN2811

Category

Organochlorine Pesticides

Description

White solid; [CAMEO] White crystalline solid; [MSDSonline] Brown to white crystals with a phosgene-like odor; [HSDB]

Sources/Uses

Used as a component of the insecticide benzene hexachloride (BHC); Technical grade HCH contains 60-70% alpha-, 5-12% beta-, 10-15% gamma, 6-10% delta-, and 3-4% epsilon-hexachlorocyclohexane." [HSDB] A by-product of Lindane production; [eChemPortal: INCHEM]

Comments

May cause CNS effects and liver damage; [ICSC] An irritant; [MSDSonline] Danger of skin absorption; [MAK]

Restricted

Production in the US was banned in 1976. [HSDB]

Exposure Assessment
MAK

0.5 mg/m3, inhalable fraction

Vapor Pressure

4.5E-5 mm Hg

Odor Threshold Low

0.08 mg/m3

Explanatory Notes

Odor threshold from HSDB; The Guide in the Emergency Response Guidebook is for "Toxic solid, organic, n.o.s."

Adverse Effects
Hepatotoxin

Hepatotoxin, Secondary

Other Poison

Organochlorine Pesticide

IARC Carcinogen

Possible Carcinogen

NTP Carcinogen

Anticipated Human Carcinogen

Links to Other NLM Databases
Health Studies

Human Health Effects from Hazardous Substances Data Bank:

Toxicity Information

Search TOXNET

Chemical Information

Search ChemIDplus

Biomedical References

Search PubMed

Related Information in HazMap
Diseases

Occupational diseases associated with exposure to this agent:

Processes

Industrial Processes with risk of exposure: