ARSENIC, INORGANIC COMPOUNDS (as As)‡

Chemical Identification
Chemical Identification
CAS # 7440-38-2
Formula

As

Synonyms

arsenic metal; arsenia; others vary depending upon the specific arsenic compound.

Physical Properties
Physical Properties
Physical description Silver-gray or tin-white metal, brittle odorless solid.
Boiling point 1135°F (sublimes) Molecular weight 74.92
Freezing point/melting point 1135°F (sublimes) Vapor pressure 0 mmHg (approx)
Flash point Vapor density
Specific gravity 5.73 (metal) Ionization potential
Lower explosive limit (LEL) Upper explosive limit (UEL)
NFPA health rating 3 NFPA fire rating 2
NFPA reactivity rating 0 NFPA special instruction
Vapor hazard ratio (VHR)
Historical exceedance percentage
Target organs
Monitoring Methods Used by OSHA
Monitoring Methods Used by OSHA
Analyte code (IMIS no.) 0260 (high sensitivity)
Sampling group METALSSG-1
Sampler/Sampling media Pre-assembled cassette with mixed cellulose ester filter (MCEF) 0.8 micron (37 mm) [MAWP037A0]
Sampling time*

240-480 min
 

Sampling volume (TWA)*

480-960 L

Sampling flow rate (TWA)*

2 L/min

Sampling volume (STEL/Peak/C)*
Sampling flow rate (STEL/Peak/C)*
Analytical method instruments ICP
Method reference OSHA 5003 (fully validated)
Notes

The METALSSG-1 sampling group members are analyzed using Inductively Coupled Plasma-Mass Spectrometry (ICP-MS) to target the expanded standards metals As, Cd, and Pb with high sensitivity (clean samples and smear tabs only).

If arsenic is the only analyte of interest, use the single analyte code 0260. If the filter is not overloaded, samples may be collected up to an 8-hour period. If As, Cd, Cu, Fe, Pb or Zn are detected, results will be provided.

Special requirements

For volatile arsenic compounds, a sodium carbonate-impregnated BUP is required in conjunction with the MCE filter [225-9001].

* 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 Whatman smear tab. [WHA1450993]

Bulk Method
Bulk Method

Available

On-Site Screening Techniques
On-Site Screening Techniques
Device
Model/Type
Sampling information
(see manufacturer instructions)
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

10 µg/m³ [5 µg/m³ Action Level]

REL-TWA TLV-TWA

0.01 mg/m³ (as As) [1990]

PEL-TWA

0.01 mg/m³ [0.005 mg/m³ Action Level]

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

0.002 mg/m³ [15 minutes]

TLV-C PEL-C
Skin notation

N

Skin notation

N

Skin notation

N

Skin notation

N

Notes:

See See 29 CFR 1910.1018, Arsenic.

Notes:

CARCINOGEN (Ca): REDUCE EXPOSURE TO LOWEST FEASIBLE CONCENTRATION. See Appendix A, NIOSH Potential Occupational Carcinogens.

Notes:

BEI®. TLV for lead arsenate (3687-31-8) was withdrawn for insufficient data in 2009.

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

5 mg/m³

Carcinogenic classifications: EPA-A, IARC-1, NIOSH-Ca, NTP-K, OSHA-Ca, TLV-A1 Notes:

Ca

AIHA emergency response planning guidelines - ERPG-1/ERPG-2/ERPG-3:
Additional Resources and Literature References
Additional Resources and Literature References

NOAA: CAMEO Chemicals - Arsenic

NIOSH: Pocket Guide to Chemical Hazards - Arsenic (Inorganic compounds, as As)

Literature References

  • EPA: Hazard Summary - Arsenic.
  • ACGIH: Documentation of the Threshold Limit Values (TLVs) and Biological Exposure Indices (BEIs) - Arsenic [7440-38-2] and inorganic compounds, as As. See annual publication for most recent information.
  • ATSDR: Toxicological Profile for Arsenic. August 2007.
  • Col, M., Col, C., Soran, A., Sayli, B.S., Ozturk, S. Arsenic-related Bowen's disease, palmar keratosis, and skin cancer. Environmental Health perspectives. 107(8):687-689, 1999.
  • Kreuzer M, Straif K, Marsh JW, Dufey F, Grosche B, Nosske D, Sogl M. Occupational dust and radiation exposure and mortality from stomach cancer among German uranium miners, 1946-2003. Occup Environ Med. 69(3):217-23, March 2012.
  • Navas-Acien A, Sharrett AR, Silbergeld EK et al. Arsenic exposure and cardiovascular disease - A systematic review of the epidemiologic evidence. Am J Epidemiol. 162(11):1037-1049, 2005.
  • NIOSH: Occupational Safety and Health Guideline for Inorganic Arsenic and its Compounds (as As) Potential Human Carcinogen. 1988.

Last Updated Date : 12/17/2020