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637-03-6

Basic Information
CAS No.: 637-03-6
Name: Phenylarsine oxide
Article Data: 18
Molecular Structure:
Molecular Structure of 637-03-6 (Phenylarsine oxide)
Formula: C6H5 As O
Molecular Weight: 168.027
Synonyms: Benzene,arsenoso- (6CI);Arsenosobenzene;Arzene;NSC 42470;Oxophenylarsine;Phenylarsine oxide;Phenylarsoxane;
EINECS: 211-275-3
Density: 1
Melting Point: 145-148 °C
Boiling Point: 100oC
Solubility: Soluble in dimethyl sulfoxide, chloroform, benzene, ether, ethanol, 50:50 dimethyl sulfoxide:1 M hydrochloric acid (3.0 mg/ml) and toluene. Insoluble in water.
Appearance: WHITE TO ALMOST WHITE CRYSTALS OR CRYST. POWDER
Hazard Symbols: TN
Risk Codes: R23/25;R50/53;
Safety: Poison by intravenous and intraperitoneal routes. When heated to decomposition it emits toxic fumes of As. See also ARSENIC COMPOUNDS.
PSA: 17.07000
LogP: 0.47410
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Chemistry

IUPAC Name: Arsorosobenzene
Synonyms: Arsine, oxophenyl- ; Oxo(phenyl)arsan ; Oxo(phenyl)arsane ; Oxo(phenyl)arsine ; Phenyl arsenoxide
Product Categories: Organometallics;As (Arsenic) Compounds;Classes of Metal Compounds;Semimetal Compounds
CAS NO:637-03-6
Molecular Formula of Phenyl arsine oxide (CAS NO.637-03-6) :C6H5AsO
Molecular Weight  of Phenyl arsine oxide (CAS NO.637-03-6) :168.02
Molecular Structure  of Phenyl arsine oxide (CAS NO.637-03-6) :
EINECS: 211-275-3
Melting point: 145-148 °C
Storage temp: Poison room
Solubility DMSO: 50 mg/mL
Stability: Stable.
Appearance:white to almost white crystals or cryst. powder
Melting point :144-146 °C (119-120 °C)
Solubility: soluble in chloroform, hot ethanol, hot benzene, slightly soluble in ethanol, insoluble in water and ether.

Uses

 Phenyl arsine oxide (CAS NO.637-03-6) is used in organic synthesis. The toxic materials is used as pesticides.

Production

Raw materials :Potassium iodide-->Sulfur dioxide-->PHENYLARSONIC ACID 
Adding Benzene arsenic acid, Methanol, concentrated Hydrochloric acid by weight ratio 1:5:2 mix, add a little Potassium iodide, and then pass into the Sulfur dioxide to saturation. The reaction of the oil-like Benzene, arsenic dichloride dissolved by Sodium hydroxide solution, and then neutralization by Hydrochloric acid ,precipitation out of Benzene, arsenic oxide.

Toxicity Data With Reference

Organism Test Type Route Reported Dose (Normalized Dose) Effect Source
mouse LD50 intraperitoneal 1930ug/kg (1.93mg/kg)   Journal of Pharmacology and Experimental Therapeutics. Vol. 74, Pg. 210, 1942.
mouse LD50 unreported 1900ug/kg (1.9mg/kg)   Journal of Pharmacology and Experimental Therapeutics. Vol. 70, Pg. 221, 1940.
mouse LDLo intravenous 1570ug/kg (1.57mg/kg)   Pharmaceutical Bulletin. Vol. 2, Pg. 19, 1954.
rabbit LD50 intravenous 790ug/kg (0.79mg/kg)   Journal of Pharmacology and Experimental Therapeutics. Vol. 69, Pg. 342, 1940.

Consensus Reports

Arsenic and its compounds are on the Community Right-To-Know List. Reported in EPA TSCA Inventory.

Safety Profile

Poison by intravenous and intraperitoneal routes. When heated to decomposition it emits toxic fumes of As. See also ARSENIC COMPOUNDS.
Hazard CodesToxicT,DangerousN
Risk Statements 23/25-50/53
R23/25:Toxic by inhalation and if swallowed. 
R50/53:Very toxic to aquatic organisms, may cause long-term adverse effects in the aquatic environment.
Safety Statements 20/21-28-45-60-61
S20/21: When using, do not eat, drink or smoke
S28:After contact with skin, wash immediately with plenty of soap-suds. 
S45:In case of accident or if you feel unwell, seek medical advice immediately (show the label whenever possible.) 
S60:This material and its container must be disposed of as hazardous waste. 
S61:Avoid release to the environment. Refer to special instructions / safety data sheets.
RIDADR UN 3465 6.1/PG 3
WGK Germany 3
RTECS CH8100000
HazardClass 6.1
PackingGroup III

Standards and Recommendations

OSHA PEL: TWA 0.5 mg(As)/m3