IUPAC Name: tetraphenylarsanium chloride
Molecular Weight: 418.7902 g/mol
Molecular Formula: C₂₄H₂₀AsCl 
EINECS: 208-070-6 
Melting Point: 258-260 °C(lit.)
Appreance: crystalline solid
log P (octanol-water): 8.050
Merck: 14,9236
BRN: 3580063
Stability of Tetraphenylarsenium chloride (CAS NO.507-28-8): Stable, Incompatible with strong oxidizing agents
H-Bond Acceptor: 1
Rotatable Bond Count: 4
MonoIsotopic Mass: 418.04695
Heavy Atom Count: 26
Complexity: 301 
Covalently-Bonded Unit Count: 2 
InChI: InChI=1S/C24H20As.ClH/c1-5-13-21(14-6-1)25(22-15-7-2-8-16-22,23-17-9-3-10-18-23)24-19-11-4-12-20-24;/h1-20H;1H/q+1;/p-1
InChIKey: NRZGVGVFPHPXEO-UHFFFAOYSA-M
Product Categories: Arsenic; Catalysis and Inorganic Chemistry; Chemical Synthesis
Mol File: 507-28-8.mol 
Synonyms of Tetraphenylarsenium chloride (CAS NO.507-28-8): Phenylarsoniumchloride(ph4ascl) ;  Tetraphenylarseniumchloride ; Tetraphenyl-arsoniuchloride ; Tetraphenylarsonium chloride hydrate, 97% ; Tetraphenylarsoniumchloridehydrate, 96% ; Tetraphenylarsoniumchloridemonohydrate, 99%

Poison by intravenous route. When heated to decomposition it emits toxic fumes of As and Cl⁻.
Hazard Codes T, N
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: 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: UN 3465 6.1/PG 3
WGK Germany: 3
RTECS: CI0600000
HazardClass: 6.1
PackingGroup: III 

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

 Tetraphenylarsenium chloride (CAS NO.507-28-8) is poison and danger. It may be fatal if people swallow, inhale or absorb through skin. It also may affect the liver, kidneys, lungs, and lymphatic system. Tetraphenylarsenium chloride (CAS NO.507-28-8) may cause cancer hazard.Remove to fresh air, if you inhale it. If not breathing, give artificial respiration. If breathing is difficult, give oxygen. Get medical attention immediately. Give large quantities of water to drink and get medical attention immediately,  if swallowed. Immediately flush skin with plenty of water for at least 15 minutes while removing contaminated clothing and shoes, if skin contact the suntance. Get medical attention immediately. Immediately flush eyes with plenty of water for at least 15 minutes, lifting lower and upper eyelids occasionally, if eyes contact the Tetraphenylarsenium chloride (CAS NO.507-28-8). Get medical attention immediately.