Agent Name

Pyridinium dichromate

CAS Number

20039-37-6

Formula

C5-H5-N.1/2Cr2-H2-O7

Major Category

Metals

Synonyms

Chromic acid (H2Cr2O7), compd. with pyridine (1:2); [ChemIDplus] UN3087

Category

Chromium Compounds, Inorganic

Description

Orange or brown crystalline powder; [MSDSonline] Soluble in water; [ECHA]

Comments

CrVI compounds are irritants, sensitizers, and may be corrosive to the skin. CrVI compounds are respiratory tract irritants and may cause pulmonary sensitization. CrVI may cause acute tubular necrosis and liver injury. [ATSDR Case Studies] An eye irritant; May cause skin sensitization; [eChemPortal: ERMA] Oxidizing agent; May cause fire on contact with combustible material; An irritant; May cause skin sensitization; [MSDSonline] See "Chromium" and linked occupational diseases.

Exposure Assessment
Skin Designation (ACGIH)

Yes

TLV (ACGIH)

0.0001 mg/m3, as Cr(VI), inhalable particulate matter

STEL (ACGIH)

0.0005 mg/m3, as Cr(VI), inhalable particulate matter

PEL (OSHA)

0.005 mg/m3, as Cr(VI)

Explanatory Notes

The Guide in the Emergency Response Guidebook is for "Oxidizing solid, toxic, n.o.s."

Adverse Effects
Skin Sensitizer

Yes

Asthma

Yes

Hepatotoxin

Hepatotoxin, Secondary

Nephrotoxin

Yes

Dermatotoxin

Skin Burns

IARC Carcinogen

Known Carcinogen

NTP Carcinogen

Human Carcinogen

ACGIH Carcinogen

Confirmed Human

Links to Other NLM Databases
Toxicity Information

Search TOXNET

Chemical Information

Search ChemIDplus

Related Information in HazMap
Diseases

Occupational diseases associated with exposure to this agent: