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124-58-3

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Basic Information
CAS No.: 124-58-3
Name: METHYLARSONIC ACID
Article Data: 28
Molecular Structure:
Molecular Structure of 124-58-3 (METHYLARSONIC ACID)
Formula: CH5 As O3
Molecular Weight: 139.97
Synonyms: Methanearsonicacid (6CI,8CI); MAA; Methylarsonic acid; Monomethylarsonic acid; NSC 71150; NSC71151; NSC 71153; NSC 71154
Density: g/cm3
Melting Point: 161°
Boiling Point: 393.3°Cat760mmHg
Flash Point: 205.8°C
Solubility: 218.8g/L(25 oC)
Hazard Symbols: Moderately toxic by ingestion.
Safety: Moderately toxic by ingestion and subcutaneous routes. When heated to decomposition it emits toxic fumes of As.

Analytical Methods:

   

For occupational chemical analysis use NIOSH: Arsenic, Organo-, 5022.

PSA: 57.53000
LogP: -1.02980
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Chemistry

IUPAC Name: Methylarsonic acid
Synonyms: Arsonic acid, As-methyl- ; CMA ; Hydrogen methylarsonate ; MAA ; Methylarsonic acid
CAS NO: 124-58-3
Molecular Formula of Methylarsenic acid (CAS NO.124-58-3) : CH5AsO3
Molecular Weight of Methylarsenic acid (CAS NO.124-58-3) : 139.97
Molecular Structure of Methylarsenic acid (CAS NO.124-58-3) :
EINECS: 204-705-6
Mol File: 124-58-3.mol
Flash Point: 205.8 °C
Enthalpy of Vaporization: 74.36 kJ/mol
Boiling Point: 393.3 °C at 760 mmHg
Vapour Pressure: 8.17E-08 mmHg at 25°C

Uses

 Methylarsenic acid (CAS NO.124-58-3) is used for the pharmaceutical industry.

Toxicity Data With Reference

1.    

orl-rat LD50:961 mg/kg

     FAATDF    Fundamental and Applied Toxicology. 7 (1986),299.
2.    

scu-mus LD50:794 mg/kg

     85JCAE    Prehled Prumyslove Toxikologie; Organicke Latky Marhold, J.,Prague, Czechoslovakia.: Avicenum,1986,1265.

Safety Profile

Moderately toxic by ingestion and subcutaneous routes. When heated to decomposition it emits toxic fumes of As.
RIDADR 2759
HazardClass 6.1(b)
PackingGroup III

Standards and Recommendations

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

Analytical Methods

For occupational chemical analysis use NIOSH: Arsenic, Organo-, 5022.