Shanghai Nianxing Industrial Co., Ltd
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Product Name: Palmitic acid
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Dayang Chem (Hangzhou) Co., Ltd.
China
Product Name: 3,4-dihydro-2-methoxy-2-methyl-4-phenylpyrano[3,2-c]chromen-5-one
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Purity: 98.0%
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518-20-7

518-20-7 structure

518-20-7 structure

Name: pyranocoumarin
Chemical Name: 2-methoxy-2-methyl-4-phenyl-3,4-dihydropyrano[3,2-c]chromen-5-one
CAS Number: 518-20-7
Molecular Formula: C₂₀H₁₈O₄
Molecular Weight: 322.35500
Catalog: analytical chemistry Standard Cosmetic standard
Create Date: 2018-08-02 11:25:58
Modify Date: 2026-07-01 10:22:26
Cyclocumarol is an anticoagulant similar to but less potent than warfarin. This product may cause hemorrhaging if used indiscriminately.

Name	2-methoxy-2-methyl-4-phenyl-3,4-dihydropyrano[3,2-c]chromen-5-one
Synonyms	BL 5 PYRANOCUMIN 2-methyl-2-methoxy-4-phenyl-3,4-dihydro-pyrano-(3,2-c)-cumin PYRANOCOUMIN Pyranocumarin [German] Pyranocoumarin 3,4-dihydro-2-methoxy-2-methyl-4-phenyl-2h,5h-pyrano(3,2-c)benzopyran-5-o Methanopyranorin 3,4-Dihydro-2-methoxy-2-methyl-4-phenyl-2H,5H-pyrano[3,2-c]benzoyran-5-one Cyclocumol Pyrancoumin Cumopyin 2H,5H-Pyrano[3,2-c]benzopyran-5-one, 3,4-dihydro-2-methoxy-2-methyl-4-phenyl Cumopyrin PYRANOCOUMIN PESTANAL compound63link 3,4-DIHYDRO-2-METHOXY-2-METHYL-4-PHENYL-2H,5H-PYRANO[3,2-C]-BENZOPYRAN-5-ONE Cumopyran 2-Methoxy-2-methyl-4-phenyl-3,4-dihydro-2H,5H-pyrano[3,2-c]chromen-5-one Pyranocoumin in methanol CYCLOCUMAROL anticoagulant No. 63 bl5 Cyclocoumol 2h,5h-pyrano(3,2-c)benzopyran-5-one,3,4-dihydro-2-methoxy-2-methyl-4-phenyl 3,4-dihydro-2-methoxy-2-methyl-4-phenylpyrano(3,2-c)chromen-5-one anticoagulans63 Compound 63 link Cyclocoumarol Anticoagulans 63

Density	1.27g/cm3
Boiling Point	488.6ºC at 760 mmHg
Melting Point	166°
Molecular Formula	C₂₀H₁₈O₄
Molecular Weight	322.35500
Flash Point	216.2ºC
Exact Mass	322.12100
PSA	48.67000
LogP	4.07000
Index of Refraction	1.624

CHEMICAL IDENTIFICATION

RTECS NUMBER :: UQ0335200

CHEMICAL NAME :: 2H,5H-Pyrano(3,2-c)(1)benzopyran-5-one, 3,4-dihydro-2-methoxy-2-methyl-4-phenyl-

CAS REGISTRY NUMBER :: 518-20-7

LAST UPDATED :: 199409

DATA ITEMS CITED :: 4

MOLECULAR FORMULA :: C20-H18-O4

MOLECULAR WEIGHT :: 322.38

HEALTH HAZARD DATA

ACUTE TOXICITY DATA

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

ROUTE OF EXPOSURE :: Oral

SPECIES OBSERVED :: Rodent - rat

DOSE/DURATION :: 4 gm/kg

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

REFERENCE :: 85ARAE "Agricultural Chemicals," Thomson, W.T., 4 vols., Fresno, CA, Thomson Publications, 1976/77 revision Volume(issue)/page/year: 3,142,1986

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

ROUTE OF EXPOSURE :: Administration onto the skin

SPECIES OBSERVED :: Rodent - rat

DOSE/DURATION :: 21 mg/kg

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

REFERENCE :: 85JFAN "Agrochemicals Handbook," with updates, Hartley, D., and H. Kidd, eds., Nottingham, Royal Soc. of Chemistry, 1983-86 Volume(issue)/page/year: A355,1983

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

ROUTE OF EXPOSURE :: Oral

SPECIES OBSERVED :: Rodent - mouse

DOSE/DURATION :: 1600 mg/kg

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

REFERENCE :: SMWOAS Schweizerische Medizinische Wochenschrift. (Schwabe & Co., Steintorst 13, 4010 Basel, Switzerland) V.50- 1920- Volume(issue)/page/year: 83,471,1953

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

ROUTE OF EXPOSURE :: Oral

SPECIES OBSERVED :: Rodent - rabbit

DOSE/DURATION :: 1 gm/kg

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

REFERENCE :: SMWOAS Schweizerische Medizinische Wochenschrift. (Schwabe & Co., Steintorst 13, 4010 Basel, Switzerland) V.50- 1920- Volume(issue)/page/year: 83,471,1953

Symbol	GHS06
Signal Word	Danger
Hazard Statements	H310
Precautionary Statements	P262-P280-P302 + P352 + P310-P361 + P364
Personal Protective Equipment	Eyeshields;Faceshields;full-face particle respirator type N100 (US);Gloves;respirator cartridge type N100 (US);type P1 (EN143) respirator filter;type P3 (EN 143) respirator cartridges
Hazard Codes	T+
Risk Phrases	27
Safety Phrases	28-36/37-45
RIDADR	UN 2811
RTECS	UQ0335200
Packaging Group	III
Hazard Class	6.1(b)
HS Code	2932999099

HS Code	2932999099
Summary	2932999099. other heterocyclic compounds with oxygen hetero-atom(s) only. VAT:17.0%. Tax rebate rate:13.0%. . MFN tariff:6.5%. General tariff:20.0%

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