Phosphorous acid,tris(4-methylphenyl) ester cas no:620-42-8

NamePhosphorous acid,tris(4-methylphenyl) ester
CAS620-42-8
SynonymsPhosphorousacid, tri-p-tolyl ester (8CI); p-Tolyl phosphite ((C7H7O)3P) (7CI); p-Tolylphosphite (6CI); NSC 4054; Tri-p-cresyl phosphite; Tri-p-tolyl phosphite;Tris(4-methylphenoxy)phosphine; Tris(4-methylphenyl) phosphite; Tris(4-tolyl)phosphite; Tris(p-methylphenyl) phosphite; Tris(p-tolyl) phosphite
EINECS(EC#)210-639-9
Molecular FormulaC21H21 O3 P
Molecular Weight400.39

refractive index1.5724-1.5744

Hazard C
Risk 34
Safety

Poison by subcutaneous route. When heated to decomposition it emits toxic fumes of PO_x. See also ESTERS.
Hazard Codes: C
Risk Statements: 34 
R34:Causes burns.
Safety Statements: 45-36/37/39-25 
S25:Avoid contact with eyes. 
S36/37/39:Wear suitable protective clothing, gloves and eye/face protection. 
S45:In case of accident or if you feel unwell, seek medical advice immediately (show the label whenever possible.)

Organism	Test Type	Route	Reported Dose (Normalized Dose)	Effect	Source
cat	LDLo	subcutaneous	200mg/kg (200mg/kg)	BEHAVIORAL: ATAXIA	Journal of Pharmacology and Experimental Therapeutics. Vol. 49, Pg. 78, 1933.
rat	LDLo	subcutaneous	3gm/kg (3000mg/kg)	PERIPHERAL NERVE AND SENSATION: FLACCID PARALYSIS WITHOUT ANESTHESIA (USUALLY NEUROMUSCULAR BLOCKAGE) BEHAVIORAL: TREMOR BEHAVIORAL: MUSCLE WEAKNESS	Journal of Pharmacology and Experimental Therapeutics. Vol. 49, Pg. 78, 1933.

 Tri-p-tolyl phosphite (CAS NO.620-42-8) hasn't been listed as a carcinogen by NTP, IARC, ACGIH, or CA Prop 65. You can see actual entry in RTECS for complete information.