SULFURIC ACID†

Chemical Identification
Chemical Identification
CAS # 7664-93-9
Formula

H₂SO₄

Synonyms

battery acid; hydrogen sulfate; oil of vitriol

Physical Properties
Physical Properties
Physical description Colorless to dark-brown, oily, odorless liquid.
Boiling point 554°F Molecular weight 98.1
Freezing point/melting point 51°F Vapor pressure 0.001 mmHg
Flash point Vapor density 3.4
Specific gravity 1.84 (96-98% acid) Ionization potential
Lower explosive limit (LEL) Upper explosive limit (UEL)
NFPA health rating 3 NFPA fire rating 0
NFPA reactivity rating 2 NFPA special instruction W: Reacts violently or explosively with water.
Vapor hazard ratio (VHR)
Historical exceedance percentage
Target organs
Monitoring Methods Used by OSHA
Monitoring Methods Used by OSHA
Analyte code (IMIS no.) 2310
Sampling group
Sampler/Sampling media Pre-assembled cassette with mixed cellulose ester filter (MCEF) 0.8 micron (37 mm) [MAWP037A0]
Sampling time*

240 min

Sampling volume (TWA)*

480 L

Sampling flow rate (TWA)*

2 L/min

Sampling volume (STEL/Peak/C)*
Sampling flow rate (STEL/Peak/C)*
Analytical method instruments IC
Method reference OSHA ID-113 (partially validated)
Notes

Submit as a separate sample. Within 1 hour after sampling, transfer the filter to a clean screw cap vial. Phosphoric and sulfuric acid may be submitted on the same filter. Large quantities of any one of the analytes can result in masking of the peaks of other analytes. 

Special requirements

* All sampling instructions above are recommended guidelines for OSHA Compliance Safety and Health Officers (CSHOs), please see the corresponding OSHA method reference for complete details.

Wipe Method
Wipe Method
Sampler/Sampling media

Wipe with mixed cellulose ester filter (MCEF) 0.8 micron (37 mm). [AAWP03700]

Bulk Method
Bulk Method
On-Site Screening Techniques
On-Site Screening Techniques
Device Detector tube Detector tube
Model/Type Dräger - Sulphuric Acid 1/a, 6728781 Gastec 35
Sampling information
(see manufacturer instructions)
100 strokes, 1-5 mg/m³ range, uncertainty 49% 10 strokes, 0.2-5 mg/m³ range, uncertainty 16% for 0.5-2 mg/m³, 8% for 3-5 mg/m³
Exposure Limits
Exposure Limits
OSHA PEL
8-hour TWA
(ST) STEL
(C) Ceiling
Peak
NIOSH REL
Up to 10-hour TWA
(ST) STEL
(C) Ceiling
ACGIH TLV©
8-hour TWA
(ST) STEL
(C) Ceiling
CAL/OSHA PEL
8-hour TWA
(ST) STEL
(C) Ceiling
Peak
PEL-TWA

1 mg/m³

REL-TWA

1 mg/m³

TLV-TWA

0.2 mg/m³ (thoracic particulate matter) [2000]

PEL-TWA

0.1 mg/m³

PEL-STEL REL-STEL TLV-STEL PEL-STEL

3 mg/m³

PEL-C REL-C TLV-C PEL-C
Skin notation

N

Skin notation

N

Skin notation

N

Skin notation

N

Notes:

See 29 CFR 1910.1000 Table Z-1.

Notes: Notes: Notes:
Health factors:  See NIH-NLM PubChem. IDLH

15 mg/m³

Carcinogenic classifications: IARC-1, TLV-A2, NTP-K (All refer to strong and inorganic acid mists contianing sulfuric acid) Notes:
AIHA emergency response planning guidelines - ERPG-1/ERPG-2/ERPG-3:

2 mg/m³/10 mg/m³/120 mg/m³

Additional Resources and Literature References
Additional Resources and Literature References

NOAA: CAMEO Chemicals - Sulfuric acid

NIOSH: Pocket Guide to Chemical Hazards - Sulfuric acid

Literature References

  • ACGIH: Documentation of the Threshold Limit Values (TLVs) and Biological Exposure Indices (BEIs) - Sulfuric acid. See annual publication for most recent information.
  • IARC Monographs Strong Acid Mists Containing Sulfuric Acid, 100-F, 2011 .
  • Lai, M.W., et al.: 2005 Annual Report of the American Association of Poison Control Centers’ National Poisoning and Exposure Database. Clinical Toxicology. 40: 803-932, 2006.
  • NTP Report on Carcinogens Strong Inorganic Mists Containing Sulfuric Acid
  • NIOSH: Occupational Health Guideline for Sulfuric Acid. September 1978.
  • Suyama, Y., Takaku, S., Okawa, Y, Matsukubo, T.: Dental erosion in workers exposed to sulfuric acid in lead storage battery manufacturing facility. Bull Tokyo Dent Coll. 51(2):77-83, 2010.

Last Updated Date : 01/12/2021