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5902-95-4

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Basic Information
CAS No.: 5902-95-4
Name: calcium bis(methylarsonate)
Molecular Structure:
Molecular Structure of 5902-95-4 (calcium bis(methylarsonate))
Formula: CH5 As O3 . 1/2 Ca
Molecular Weight: 318.02
Synonyms: Methanearsonicacid, calcium salt (2:1) (8CI); CMA; Calar; Calcium acid methanearsonate;Calcium hydrogen methanearsonate
Density: g/cm3
Boiling Point: 393.3°Cat760mmHg
Flash Point: 205.8°C
Safety: Moderately toxic by intraperitoneal and possibly other routes. Arsenic compounds are considered to be poisons. An herbicide. When heated to decomposition it emits toxic fumes of As. See also ARSENIC COMPOUNDS and CALCIUM COMPOUNDS.
PSA: 120.72000
LogP: -1.18320
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  • calcium bis(methylarsonate)

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    calcium bis(methylarsonate)

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Chemistry

IUPAC Name: Calcium methyl-dioxido-oxo-λ5-arsane 
Molecular Formula: C2H8As2CaO6
Molecular Weight: 318.02g/mol
Appearance: solid
Boiling Point: 393.3°C at 760mmHg
Flash Point: 205.8°C 
Freely Rotating Bonds: 0
Polar Surface Area: 126.38 Å2 
Solubility:  soluble  0.2% in water
The Cas Register Number of Calcium acid methyl arsonate is 5902-95-4.The chemical synonyms of Calcium acid methyl arsonate (CAS NO.5902-95-4) are Calcium methylarsonate ; Calcium methanearsonate ; Methanearsonicacid,calciumsalt ; Calcium methanarsonic acid ; Methylarsonic acid calcium ; Methylarsonic acid calcium salt ; Calcium methane arsonate(MAC) .The molecular structure of Calcium acid methyl arsonate (CAS NO.5902-95-4) is.

Uses

 Calcium acid methyl arsonate (CAS NO.5902-95-4) is used as herbicide after bud-selective.

Toxicity Data With Reference

1.    

ipr-mus LD50:500 mg/kg

     NTIS**    National Technical Information Service. (Springfield, VA 22161) (Formerly U.S. Clearinghouse for Scientific and Technical Information) AD414-344 .
2.    

unr-mam LD50:4000 mg/kg

     FMCHA2    Farm Chemicals Handbook .(Meister Publishing,Willoughy, OH.: )1983,C241.

Consensus Reports

Arsenic and its compounds are on the Community Right-To-Know List.

Safety Profile

Moderately toxic by intraperitoneal and possibly other routes. Arsenic compounds are considered to be poisons. An herbicide. When heated to decomposition it emits toxic fumes of As. See also ARSENIC COMPOUNDS and CALCIUM COMPOUNDS.
Hazard Codes: IrritantXi
Risk Statements: 36/37/38 
R36/37/38: Irritating to eyes, respiratory system and skin.
Safety Statements: 26-36 
S26: In case of contact with eyes, rinse immediately with plenty of water and seek medical advice. 
S36: Wear suitable protective clothing.

Standards and Recommendations

OSHA PEL: TWA 0.5 mg(As)/m3
ACGIH TLV: BEI: 35 µ (As)/L inorganic ar   senic and methylated metabolites in urine

Specification

Its extinguishing agent are dry powder, water, sand, carbon dioxide and  foam.