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Calcium arsenate (as As)

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]
MW:
398.1
BP:
Decomposes
MLT: ? Sol(77°F): 0.01%
VP:
0 mmHg (approx)
IP:
NA
Sp.Gr:
3.62
Fl.P:
NA
UEL:
NA
LEL:
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; [potential occupational carcinogen]; in animals: liver damage
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   See ICSC CARD: 0765
 
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