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Chemical Sampling Information (CSI)
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General Description

Synonyms: Chromium Oxide

OSHA IMIS Code Number: 0685

Chemical Abstracts Service (CAS) Registry Number: 7440-47-3; 1308-38-9

NIOSH Registry of Toxic Effects of Chemical Substances (RTECS) Identification Number: GB4200000

Chemical Description and Physical Properties:
Appearance and odor vary depending upon specific compound.
Incompatibilities: Strong oxidizers

Exposure Limits

OSHA Permissible Exposure Limit (PEL):
General Industry: 1.0 mg/m3

Construction Industry: 1 mg/m3 TWA
American Conference of Governmental Industrial Hygienists (ACGIH) Threshold Limit Value (TLV): 0.5 mg/m3 TWA

National Institute for Occupational Safety and Health (NIOSH) Recommended Exposure Limit (REL): 0.5 mg/m3 TWA

Health Factors

Carcinogenic Classification:
International Agency for Research on Cancer (IARC): Group 3, not classifiable as to its carcinogenicity to humans
Potential Symptoms: Histologic fibrosis of lungs

Affected Organs: Respiratory system

Date Last Revised: 01/15/1993

NIOSH/OSHA/DOE Health Guideline: Chromium III

Monitoring Methods used by OSHA

Primary Laboratory Sampling/Analytical Method (SLC1):
  • sampling media: Mixed Cellulose Ester Filter (MCEF) 0.8 microns
    maximum volume: 960 Liters
    minimum volume: 480 Liters
    maximum flow rate 2.0 L/min
    analytical method 1: Atomic Absorption Spectroscopy; AAS
    method reference: 2 (OSHA ID-121)
    sampling and analytical error: 0.12
    method classification: Fully Validated
    analytical method A: Inductively Coupled Argon Plasma; ICP/DCP-AES
    method reference: 2 (OSHA ID-125G)
    sampling and analytical error: 0.13
    method classification: Fully Validated
    note: If the filter is not overloaded, samples may be collected up to an 8-hour period. When analysis of a compound is requested, an elemental analysis is performed and reported as total chromium.
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