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16331-85-4

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Basic Information
CAS No.: 16331-85-4
Name: CESIUM DIHYDROGEN ARSENATE
Molecular Structure:
Molecular Structure of 16331-85-4 (CESIUM DIHYDROGEN ARSENATE)
Formula: AsH3 O4 . Cs
Molecular Weight: 274.86
Synonyms: Cesium arsenate(CsH2AsO4) (6CI); Arsenic acid cesium salt; CDA; CDA (frequency multiplier);Cesium dihydrogen arsenate; Cesium dihydrogen arsenate (CsH2AsO4); Cesiumhydrogen arsenate (CsH2AsO4)
Density: g/cm3
Boiling Point: °Cat760mmHg
Flash Point: °C
Risk Codes: 23/25-50/53
Safety: Confirmed human carcinogen. A poison by ingestion. When heated to decomposition it emits toxic vapors of As and Cs.
PSA: 80.59000
LogP: -1.73240
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Chemistry

IUPAC Name: Tricesium arsorate
Synonyms of Caesium arsenate (CAS NO.16331-85-4): Arsenic acid cesium salt ; CDA ; CDA (frequency multiplier) ; Cesium dihydrogen arsenate ; Arsenic acid (H3AsO4), monocesium salt (8CI,9CI)
CAS NO: 16331-85-4
Molecular Formula of Caesium arsenate (CAS NO.16331-85-4): AsCs3O4 
Molecular Weight: 537.6356 
H bond acceptors: 4
H bond donors: 3
Freely Rotating Bonds: 0
Polar Surface Area: 77.76 Å2
Molecular Structure:

Toxicity Data With Reference

Organism Test Type Route Reported Dose (Normalized Dose) Effect Source
mouse LD50 oral 116mg/kg (116mg/kg) BEHAVIORAL: WAKEFULNESS

BEHAVIORAL: SOMNOLENCE (GENERAL DEPRESSED ACTIVITY)

BEHAVIORAL: MUSCLE CONTRACTION OR SPASTICITY)		 Gigiena Truda i Professional'nye Zabolevaniya. Labor Hygiene and Occupational Diseases. Vol. 21(1), Pg. 29, 1977.
rat LD50 oral 335mg/kg (335mg/kg) BEHAVIORAL: WAKEFULNESS

BEHAVIORAL: SOMNOLENCE (GENERAL DEPRESSED ACTIVITY)

BEHAVIORAL: MUSCLE CONTRACTION OR SPASTICITY)		 Gigiena Truda i Professional'nye Zabolevaniya. Labor Hygiene and Occupational Diseases. Vol. 21(1), Pg. 29, 1977.

Safety Profile

Risk Statements of Caesium arsenate (CAS NO.16331-85-4): 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: When using, do not eat or drink. S21:When using do not 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: 1557
HazardClass: 6.1
PackingGroup: II
Confirmed human carcinogen. A poison by ingestion. When heated to decomposition it emits toxic vapors of As and Cs.

Standards and Recommendations

ACGIH TLV: TLV 0.01 mg/m3Confirmed Human Carcinogen; BEI: 35 µ (As)/L inorganic arsenic and methylated metabolites in urine
NIOSH REL: (Arsenic, Inorganic) CL 0.002 mg(As)/m3/15M