Pyridinium dichromate
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.
Biomedical References
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
Hepatoxic (a) from occupational exposure (secondary effect) or (b) in animal studies or in humans after ingestion
Nephrotoxin
Yes
Dermatotoxin
Skin burns
IARC Carcinogen
Established
NTP Carcinogen
Human carcinogen
ACGIH Carcinogen
Confirmed Human
Diseases, Processes, and Activities Linked to This Agent
Diseases
Occupational diseases associated with exposure to this agent: