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Calcium arsenate (as As)

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Synonyms & Trade Names
Calcium salt (2:3) of arsenic acid, Cucumber dust, Tricalcium arsenate, Tricalcium ortho-arsenate [Note: Also see specific listing for Arsenic (inorganic compounds, as As).]
CAS No.
7778-44-1
RTECS No.
CG0830000
DOT ID & Guide
1573 151
Formula
Ca₃(AsO₄)₂
Conversion
IDLH
Ca [5 mg/m3 (as As)]
See: 7778441
Exposure Limits
NIOSH REL
Ca C 0.002 mg/m3 [15-minute] See Appendix A
OSHA PEL
[1910.1018] TWA 0.010 mg/m3
Measurement Methods
NIOSH 7900;
OSHA ID105
See: NMAM or OSHA Methods
Physical Description
Colorless to white, odorless solid. [insecticide/herbicide]
Molecular Weight
398.1
Boiling Point
Decomposes
Melting Point
?
Solubility
(77°F): 0.01%
Vapor Pressure
0 mmHg (approx)
Ionization Potential
NA
Specific Gravity
3.62
Flash Point
NA
Upper Explosive Limit
NA
Lower Explosive Limit
NA
Noncombustible Solid
Incompatibilities & Reactivities
None reported [Note: Produces toxic fumes of arsenic when heated to decomposition.]
Exposure Routes
inhalation, skin absorption, ingestion, skin and/or eye contact
Symptoms
lassitude (weakness, exhaustion); gastrointestinal disturbance; peripheral neuropathy; skin hyperpigmentation, palmar planter hyperkeratoses; dermatitis; ; In Animals: liver damage [potential occupational carcinogen]
Target Organs
Eyes, respiratory system, liver, skin, central nervous system, lymphatic system
Cancer Site
[lymphatic & lung cancer]
Personal Protection/Sanitation
(See protection codes)
Skin:Prevent skin contact
Eyes:Prevent eye contact
Wash skin:When contaminated/Daily
Remove:When wet or contaminated
Change:Daily
Provide:Eyewash, Quick drench
First Aid
(See procedures)
Eye:Irrigate immediately
Skin:Soap wash promptly
Breathing:Respiratory support
Swallow:Medical attention immediately
Respirator Recommendations

NIOSH

At concentrations above the NIOSH REL, or where there is no REL, at any detectable concentration:
(APF = 10,000) Any self-contained breathing apparatus that has a full facepiece and is operated in a pressure-demand or other positive-pressure mode
(APF = 10,000) Any supplied-air respirator that has a full facepiece and is operated in a pressure-demand or other positive-pressure mode in combination with an auxiliary self-contained positive-pressure breathing apparatus

Escape:


(APF = 50) Any air-purifying, full-facepiece respirator with an N100, R100, or P100 filter.
Click here for information on selection of N, R, or P filters. 


Any appropriate escape-type, self-contained breathing apparatus

Important additional information about respirator selection

See also
INTRODUCTION   ICSC CARD: 0765
Page last reviewed: October 30, 2019
Content source: National Institute for Occupational Safety and Health