Shanghai Nianxing Industrial Co., Ltd
China
Product Name: Palmitic acid
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Dayang Chem (Hangzhou) Co., Ltd.
China
Product Name: 2-Oxo-2H-1-benzopyran-3-carboxylic acid methyl ester
Price: $Inquiry/100g $Inquiry/1kg $Inquiry/100kg $Inquiry/1000kg
Purity: 98.0%
Stocking Period: Inquiry
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21259-42-7

21259-42-7 structure

21259-42-7 structure

Name: 2-Oxo-2H-1-benzopyran-3-carboxylic acid methyl ester
Chemical Name: methyl 2-oxochromene-3-carboxylate
CAS Number: 21259-42-7
Molecular Formula: C₁₁H₈O₄
Molecular Weight: 204.17900
Create Date: 2016-07-21 06:02:10
Modify Date: 2025-09-26 03:37:35

Name	methyl 2-oxochromene-3-carboxylate
Synonyms	2-Oxo-2H-chromene-3-carboxylic acid methyl ester Methyl 2-oxo-2H-chromene-3-carboxylate methyl 2-oxochromen-3-carboxylate F0110-0035 2-Oxo-2H-1-benzopyran-3-carboxylic acid methyl ester 2-oxochromene-3-carboxylic acid methyl ester 2H-1-BENZOPYRAN-3-CARBOXYLIC ACID,2-OXO-,METHYL ESTER methyl coumarin-3-carboxylate

Density	1.337g/cm3
Boiling Point	368.9ºC at 760 mmHg
Molecular Formula	C₁₁H₈O₄
Molecular Weight	204.17900
Flash Point	192.9ºC
Exact Mass	204.04200
PSA	56.51000
LogP	1.57960
Vapour Pressure	1.23E-05mmHg at 25°C
Index of Refraction	1.578

CHEMICAL IDENTIFICATION

RTECS NUMBER :: DJ2502400

CHEMICAL NAME :: 2H-1-Benzopyran-3-carboxylic acid, 2-oxo-, methyl ester

CAS REGISTRY NUMBER :: 21259-42-7

BEILSTEIN REFERENCE NO. :: 0176130

LAST UPDATED :: 199612

DATA ITEMS CITED :: 1

MOLECULAR FORMULA :: C11-H8-O4

MOLECULAR WEIGHT :: 204.19

HEALTH HAZARD DATA

ACUTE TOXICITY DATA

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

ROUTE OF EXPOSURE :: Subcutaneous

SPECIES OBSERVED :: Rodent - mouse

DOSE/DURATION :: 72 mg/kg

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

REFERENCE :: YKKZAJ Yakugaku Zasshi. Journal of Pharmacy. (Nippon Yakugakkai, 2-12-15 Shibuya, Shibuya-ku, Tokyo 150, Japan) No.1- 1881- Volume(issue)/page/year: 75,1486,1955

HS Code	2932209090

Precursor 7
90-02-8 108-59-8 845866-31-1 89-95-2
762-42-5 67-56-1 531-81-7
DownStream 4
1032-97-9 1846-76-0 531-81-7 3757-06-0

HS Code	2932209090
Summary	2932209090. other lactones. VAT:17.0%. Tax rebate rate:13.0%. . MFN tariff:6.5%. General tariff:20.0%

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