Shanghai Nianxing Industrial Co., Ltd
China
Product Name: Palmitic acid
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Dayang Chem (Hangzhou) Co., Ltd.
China
Product Name: 5-Methyl-3-phenylisoxazole-4-carboxylic acid
Price: $Inquiry/100g $Inquiry/1kg $Inquiry/100kg $Inquiry/1000kg
Purity: 98.0%
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1136-45-4

1136-45-4 structure

1136-45-4 structure

Name: 5-Methyl-3-phenyl-1,2-oxazole-4-carboxylic acid
Chemical Name: 5-Methyl-3-Phenylisoxazole-4-Carboxylic Acid
CAS Number: 1136-45-4
Molecular Formula: C₁₁H₉NO₃
Molecular Weight: 203.194
Create Date: 2018-12-08 21:20:15
Modify Date: 2026-08-15 16:12:17

Name	5-Methyl-3-Phenylisoxazole-4-Carboxylic Acid
Synonyms	5-Methyl-3-Phenyl-Isoxazol-4-Cboxylic Acid Oxacillin Impurity C (Oxacillin Related Compound C) 3-phenyl-5-methylisoxazol-4-cbonsaeure 5-Methyl-3-phenylisoxazole-4-carboxylic acid Oxacillin Sodium Monohydrate Impurity C Oxacillin Related Compound C (15 mg) 5-METHYL-3-PHENYLISOXAZOLE-4-CBOXYLIC& MFCD00003153 Oxacillin Impurity 3 (Oxacillin Impurity C) 1-(4-Cboxy-5-methylisoxazol-3-yl)benzene (4-Cboxy-5-methylisoxazol-3-yl)benzene, 5-Methyl-3-phenyl-1,2-oxazole-4-cboxylic acid Oxacillin Related Compound C 5-Methyl-3-phenylisoxazole-4-cboxylic acid Oxacillin Related Compound C (5-Methyl-3-phenylisoxazole-4-cboxylic acid) EINECS 214-497-9 Oxacillin Impurity 8 Oxacillin Sodium Impurity C 5-METHYL-3-PHENYL-4-ISOXAZOLECBOXYLIC ACID 4-Isoxazolecboxylic acid, 5-methyl-3-phenyl PMI-acid 5-Methyl-3-phenyl-4-isooxazolic acid 5-METHYL-3-PHENYL-4-ISOXAZOLIC ACID 5-methyl-3-phenyl-4-isoxazolecboxylicaci TIMTEC-BB SBB010075 4-Cboxy-5-methyl-3-phenylisoxazole 3-PHENYL-5-METHYL-4-ISOXAZOLICACID Oxacillin Impurity 16 5-methyl-3-phenylisoxazole-4-cboxylic acid(SALTDATA: FREE) 3-PHENYL-5-METHYL-ISOXAZOLE-4-CBOXYLIC ACID 5-Methyl-3-phenylisoxazole-4-coxylic acid RECHEM AL BE 0514 Oxacillin sodium monohydrate ImpurityC 5-methyl-3-phenyl-isoxazole-4-cboxylicaci

Density	1.3±0.1 g/cm3
Boiling Point	365.0±37.0 °C at 760 mmHg
Melting Point	192-194 °C(lit.)
Molecular Formula	C₁₁H₉NO₃
Molecular Weight	203.194
Flash Point	174.5±26.5 °C
Exact Mass	203.058243
PSA	63.33000
LogP	1.16
Vapour Pressure	0.0±0.9 mmHg at 25°C
Index of Refraction	1.579

CHEMICAL IDENTIFICATION

RTECS NUMBER :: NY2750000

CHEMICAL NAME :: Isoxazole-4-carboxylic acid, 5-methyl-3-phenyl-

CAS REGISTRY NUMBER :: 1136-45-4

BEILSTEIN REFERENCE NO. :: 0164939

LAST UPDATED :: 199701

DATA ITEMS CITED :: 3

MOLECULAR FORMULA :: C11-H9-N-O3

MOLECULAR WEIGHT :: 203.21

WISWESSER LINE NOTATION :: T5NOJ C1 DVQ ER

HEALTH HAZARD DATA

ACUTE TOXICITY DATA

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

ROUTE OF EXPOSURE :: Intraperitoneal

SPECIES OBSERVED :: Rodent - rat

DOSE/DURATION :: 1500 mg/kg

TOXIC EFFECTS :: Lungs, Thorax, or Respiration - dyspnea

REFERENCE :: ARZNAD Arzneimittel-Forschung. Drug Research. (Editio Cantor Verlag, Postfach 1255, W-7960 Aulendorf, Fed. Rep. Ger.) V.1- 1951- Volume(issue)/page/year: 12,781,1962

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

ROUTE OF EXPOSURE :: Intravenous

SPECIES OBSERVED :: Rodent - mouse

DOSE/DURATION :: 300 mg/kg

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

REFERENCE :: ARZNAD Arzneimittel-Forschung. Drug Research. (Editio Cantor Verlag, Postfach 1255, W-7960 Aulendorf, Fed. Rep. Ger.) V.1- 1951- Volume(issue)/page/year: 15,322,1965

Hazard Codes	Xi: Irritant;
Risk Phrases	R22
Safety Phrases	S24/25-S36/37-S22
RIDADR	NONH for all modes of transport
WGK Germany	3
RTECS	NY2750000
HS Code	2934999090

Precursor 10
2065-28-3 1143-82-4 100-52-7 105-45-3
873-67-6 590-93-2 698-16-8 932-90-1
6497-25-2 1076-59-1
DownStream 10
341001-38-5 87967-95-1 1008-74-8 1143-82-4
16883-16-2 1736-18-1 18718-79-1 2065-28-3
18336-75-9 64769-68-2

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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