Shanghai Nianxing Industrial Co., Ltd
China
Product Name: 3-Chloroisoxazole-5-carboxylic acid
Price: Check
Purity: 95.0%
Stocking Period: 10 Day
Contact: Yang
Email: sales@echemcloud.com

Dayang Chem (Hangzhou) Co., Ltd.
China
Product Name: 3-Chloro-5-isoxazolecarboxylic acid
Price: $Inquiry/100g $Inquiry/1kg $Inquiry/100kg $Inquiry/1000kg
Purity: 98.0%
Stocking Period: Inquiry
Contact: Ms Wang
Email: enquiry@dycnchem.com

20724-56-5

20724-56-5 structure

20724-56-5 structure

Name: 3-Chloro-5-isoxazolecarboxylic acid
Chemical Name: 3-chloro-1,2-oxazole-5-carboxylic acid
CAS Number: 20724-56-5
Molecular Formula: C₄H₂ClNO₃
Molecular Weight: 147.51700
Create Date: 2018-07-19 11:39:46
Modify Date: 2025-09-18 13:31:10

Name	3-chloro-1,2-oxazole-5-carboxylic acid
Synonyms	3-chloro-5-isoxazolecarboxylic acid 3-chloroisoxazol-5-carboxylic acid 3-Chlor-isoxazol-carbonsaeure-(5) 3-Chlorisoxazol-5-carbonsaeure 5-ISOXAZOLECARBOXYLIC ACID,3-CHLORO 3-Chloroisoxazole-5-carboxylic acid

Density	1.64g/cm3
Boiling Point	342.6ºC at 760 mmHg
Molecular Formula	C₄H₂ClNO₃
Molecular Weight	147.51700
Flash Point	161ºC
Exact Mass	146.97200
PSA	63.33000
LogP	1.02620
Vapour Pressure	2.87E-05mmHg at 25°C
Index of Refraction	1.545

CHEMICAL IDENTIFICATION

RTECS NUMBER :: NY2375000

CHEMICAL NAME :: 5-Isoxazolecarboxylic acid, 3-chloro-

CAS REGISTRY NUMBER :: 20724-56-5

LAST UPDATED :: 199612

DATA ITEMS CITED :: 1

MOLECULAR FORMULA :: C4-H2-Cl-N-O3

HEALTH HAZARD DATA

ACUTE TOXICITY DATA

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

ROUTE OF EXPOSURE :: Oral

SPECIES OBSERVED :: Rodent - mouse

DOSE/DURATION :: 1860 mg/kg

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

REFERENCE :: BCPCA6 Biochemical Pharmacology. (Pergamon Press Inc., Maxwell House, Fairview Park, Elmsford, NY 10523) V.1- 1958- Volume(issue)/page/year: 18,569,1969

HS Code	2934999090

80403-94-7 structure

80403-94-7

~%

20724-56-5 structure

20724-56-5

Literature: Gazzetta Chimica Italiana, , vol. 91, p. 47 - 64

105175-03-9 structure

105175-03-9

~%

20724-56-5 structure

20724-56-5

Literature: Gazzetta Chimica Italiana, , vol. 91, p. 47 - 64

Precursor 1
105175-03-9
DownStream 1
13626-59-0

HS Code	2934999090
Summary	2934999090. other heterocyclic compounds. VAT:17.0%. Tax rebate rate:13.0%. . MFN tariff:6.5%. General tariff:20.0%

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