Shanghai Nianxing Industrial Co., Ltd
China
Product Name: tris(4-methylphenyl)phosphine oxide
Price: Check
Purity: 98.0%
Stocking Period: 10 Day
Contact: Yang
Email: sales@echemcloud.com

Dayang Chem (Hangzhou) Co., Ltd.
China
Product Name: TRI-P-TOLYLPHOSPHINE OXIDE
Price: $Inquiry/100g $Inquiry/1kg $Inquiry/100kg $Inquiry/1000kg
Purity: 98.0%
Stocking Period: Inquiry
Contact: Ms Wang
Email: enquiry@dycnchem.com

797-70-6

797-70-6 structure

797-70-6 structure

Name: tris(4-methylphenyl)phosphine oxide
Chemical Name: 1-bis(4-methylphenyl)phosphoryl-4-methylbenzene
CAS Number: 797-70-6
Molecular Formula: C₂₁H₂₁OP
Molecular Weight: 320.36500
Catalog: Organic raw materials Organic phosphine compound
Create Date: 2018-06-29 13:11:06
Modify Date: 2025-08-23 11:43:03

Name	1-bis(4-methylphenyl)phosphoryl-4-methylbenzene
Synonyms	tris-(4-methylphenyl)phosphine oxide tri(4-methylphenyl)phosphine oxide MFCD00059321 Phosphine oxide,tris(p-tolyl) Tris(p-tolyl)phosphine oxide tritolylphosphine oxide Tri-p-tolylphosphine Oxide tri(4-tolyl)phosphine oxide tri(p-tolyl)phosphane oxide

Density	1.12g/cm3
Boiling Point	490ºC at 760 mmHg
Melting Point	145ºC
Molecular Formula	C₂₁H₂₁OP
Molecular Weight	320.36500
Flash Point	250.2ºC
Exact Mass	320.13300
PSA	26.88000
LogP	4.25120
Index of Refraction	1.598

CHEMICAL IDENTIFICATION

RTECS NUMBER :: SZ2000000

CHEMICAL NAME :: Phosphine oxide, tris(p-tolyl)-

CAS REGISTRY NUMBER :: 797-70-6

BEILSTEIN REFERENCE NO. :: 2810669

LAST UPDATED :: 199612

DATA ITEMS CITED :: 1

MOLECULAR FORMULA :: C21-H21-O-P

MOLECULAR WEIGHT :: 320.39

WISWESSER LINE NOTATION :: 1R DPO&R D1&R D1

HEALTH HAZARD DATA

ACUTE TOXICITY DATA

TYPE OF TEST :: LD50 - Lethal dose, 50 percent kill

ROUTE OF EXPOSURE :: Intravenous

SPECIES OBSERVED :: Rodent - mouse

DOSE/DURATION :: 56 mg/kg

TOXIC EFFECTS :: Details of toxic effects not reported other than lethal dose value

REFERENCE :: CSLNX* U.S. Army Armament Research & Development Command, Chemical Systems Laboratory, NIOSH Exchange Chemicals. (Aberdeen Proving Ground, MD 21010) Volume(issue)/page/year: NX#02262

RTECS	SZ2000000
HS Code	2931900090

Precursor 9
1038-95-5 6224-65-3 106-38-7 124-64-1
7175-54-4 4294-57-9 73116-91-3 3400-27-9
61249-20-5
DownStream 3
1038-95-5 6840-28-4 791-28-6

HS Code	2931900090
Summary	2931900090. other organo-inorganic compounds. VAT:17.0%. Tax rebate rate:13.0%. Supervision conditions:AB(certificate of inspection for goods inward,certificate of inspection for goods outward). MFN tariff:6.5%. General tariff:30.0%

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