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Chemical Sampling Information (CSI)
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General Description

Synonyms: FeSO4: Ferrous sulfate, Iron(II) sulfate; FeCl2: Ferrous chloride, Iron(II) chloride; Fe(NO3)3: Ferric nitrate, Iron(III) nitrate; Fe(SO4)3: Ferric sulfate, Iron(III) sulfate; FeCl3: Ferric chloride, Iron(III) chloride

OSHA IMIS Code Number: 1522

Chemical Abstracts Service (CAS) Registry Number: Varies: 7720-78-7 (FeSO4) 17375-41-6, monohydrate & 7782-63-0, heptahydrate; 7758-94-3 (FeCl2) 16399-77-2, dihydrate & 13478-10-9, tetrahydrate; 10421-48-4 (Fe(NO3)3) 13476-08-9, hexahyrdate & 7782-61-8, nonahydrate; 10028-22-5 (Fe(SO4)3) 15244-10-7, monohydrate; 7705-08-0 (FeCl3) 10025-77-1, hexahydrate

NIOSH Pocket Guide to Chemical Hazards, Iron salts (soluble, as Fe): chemical description, physical properties, potentially hazardous incompatibilities, and more

Exposure Limits

OSHA Permissible Exposure Limit (PEL):

Construction Industry: 29 CFR 1926.55 Appendix A -- 1 mg/m3 TWA

Maritime: 29 CFR 1915.1000 Table Z-Shipyards -- 1 mg/m3 TWA

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

National Institute for Occupational Safety and Health (NIOSH) Recommended Exposure Limit (REL): 1 mg/m3 TWA

Health Factors

Potential Symptoms: Irritation eyes, skin, mucous membrane; abdominal pain, diarrhea, vomiting; possible liver damage

Affected Organs: Eyes, skin, respiratory system, liver, gastrointestinal tract

Monitoring Methods used by OSHA

Primary Laboratory Sampling/Analytical Method (SLC1):

  • sampling media: Mixed Cellulose Ester Filter (MCEF) 0.8 microns
    analytical solvent: Deionized Water
    maximum volume: 960 Liters
    minimum volume: 480 Liters
    maximum flow rate: 2.0 L/min
    current analytical method: Atomic Absorption Spectroscopy; AAS/Water extraction
    method reference: OSHA Analytical Method (OSHA ID-121, OSHA ID-105)
    method classification: Partially Validated
    note: If the filter is not overloaded, samples may be collected up to an 8-hour period. Analytical method does not distinguish between dust and fume.

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