Benoxaprofen

Modify Date: 2026-07-16 12:58:28

Benoxaprofen Structure
Benoxaprofen structure
Common Name Benoxaprofen
CAS Number 51234-28-7 Molecular Weight 301.724
Density 1.4±0.1 g/cm3 Boiling Point 446.2±30.0 °C at 760 mmHg
Molecular Formula C16H12ClNO3 Melting Point 189.5 °C
MSDS N/A Flash Point 223.6±24.6 °C

 Use of Benoxaprofen


Benoxaprofen (LRCL 3794) is a potent and long-acting anti-inflammatory and antipyretic compound. Benoxaprofen is a relatively weak inhibitor of cyclooxygenase in in vitro systems, inhibits lipoxygenase in other systems, and inhibits monocyte migration in some animal models of inflammation[1][2].

 Names

Name benoxaprofen
Synonym More Synonyms

 Benoxaprofen Biological Activity

Description Benoxaprofen (LRCL 3794) is a potent and long-acting anti-inflammatory and antipyretic compound. Benoxaprofen is a relatively weak inhibitor of cyclooxygenase in in vitro systems, inhibits lipoxygenase in other systems, and inhibits monocyte migration in some animal models of inflammation[1][2].
Related Catalog
References

[1]. Cashin CH, et al. The pharmacology of benoxaprofen (2-[4-chlorophenyl]-alpha-methyl-5-benzoxazole acetic acid), LRCL 3794, a new compound with antiinflammatory activity apparently unrelated to inhibition of prostaglandin synthesis. J Pharm Pharmacol. 1977;29(6):330-336.

 Chemical & Physical Properties

Density 1.4±0.1 g/cm3
Boiling Point 446.2±30.0 °C at 760 mmHg
Melting Point 189.5 °C
Molecular Formula C16H12ClNO3
Molecular Weight 301.724
Flash Point 223.6±24.6 °C
Exact Mass 301.050568
PSA 63.33000
LogP 4.41
Vapour Pressure 0.0±1.1 mmHg at 25°C
Index of Refraction 1.639
InChIKey MITFXPHMIHQXPI-UHFFFAOYSA-N
SMILES CC(C(=O)O)c1ccc2oc(-c3ccc(Cl)cc3)nc2c1
Storage condition 2-8°C

 Toxicological Information

CHEMICAL IDENTIFICATION

RTECS NUMBER :
DM4447000
CHEMICAL NAME :
5-Benzoxazoleacetic acid, 2-(4-chlorophenyl)-alpha-methyl-
CAS REGISTRY NUMBER :
51234-28-7
LAST UPDATED :
199612
DATA ITEMS CITED :
12
MOLECULAR FORMULA :
C16-H12-Cl-N-O3
MOLECULAR WEIGHT :
301.74
WISWESSER LINE NOTATION :
T56 BN DOJ CR DG& HY1&VQ

HEALTH HAZARD DATA

ACUTE TOXICITY DATA

TYPE OF TEST :
TDLo - Lowest published toxic dose
ROUTE OF EXPOSURE :
Oral
SPECIES OBSERVED :
Human - woman
DOSE/DURATION :
168 mg/kg/2W-I
TOXIC EFFECTS :
Kidney, Ureter, Bladder - changes in tubules (including acute renal failure, acute tubular necrosis) Kidney, Ureter, Bladder - urine volume decreased Blood - eosinophilia
TYPE OF TEST :
TDLo - Lowest published toxic dose
ROUTE OF EXPOSURE :
Oral
SPECIES OBSERVED :
Human - man
DOSE/DURATION :
780 mg/kg/13W-I
TOXIC EFFECTS :
Endocrine - gynecomastia
TYPE OF TEST :
TDLo - Lowest published toxic dose
ROUTE OF EXPOSURE :
Oral
SPECIES OBSERVED :
Human - woman
DOSE/DURATION :
552 mg/kg/46D-C
TOXIC EFFECTS :
Liver - jaundice, other or unclassified
TYPE OF TEST :
LDLo - Lowest published lethal dose
ROUTE OF EXPOSURE :
Oral
SPECIES OBSERVED :
Human - woman
DOSE/DURATION :
780 mg/kg/65D-C
TOXIC EFFECTS :
Liver - jaundice, other or unclassified
TYPE OF TEST :
LD50 - Lethal dose, 50 percent kill
ROUTE OF EXPOSURE :
Oral
SPECIES OBSERVED :
Rodent - rat
DOSE/DURATION :
118 mg/kg
TOXIC EFFECTS :
Behavioral - changes in motor activity (specific assay) Behavioral - ataxia Blood - aplastic anemia
TYPE OF TEST :
LD50 - Lethal dose, 50 percent kill
ROUTE OF EXPOSURE :
Intraperitoneal
SPECIES OBSERVED :
Rodent - rat
DOSE/DURATION :
129 mg/kg
TOXIC EFFECTS :
Details of toxic effects not reported other than lethal dose value
TYPE OF TEST :
LD50 - Lethal dose, 50 percent kill
ROUTE OF EXPOSURE :
Subcutaneous
SPECIES OBSERVED :
Rodent - rat
DOSE/DURATION :
121 mg/kg
TOXIC EFFECTS :
Details of toxic effects not reported other than lethal dose value
TYPE OF TEST :
LD50 - Lethal dose, 50 percent kill
ROUTE OF EXPOSURE :
Oral
SPECIES OBSERVED :
Rodent - mouse
DOSE/DURATION :
800 mg/kg
TOXIC EFFECTS :
Details of toxic effects not reported other than lethal dose value
TYPE OF TEST :
LD50 - Lethal dose, 50 percent kill
ROUTE OF EXPOSURE :
Intraperitoneal
SPECIES OBSERVED :
Rodent - mouse
DOSE/DURATION :
398 mg/kg
TOXIC EFFECTS :
Details of toxic effects not reported other than lethal dose value
TYPE OF TEST :
LD50 - Lethal dose, 50 percent kill
ROUTE OF EXPOSURE :
Subcutaneous
SPECIES OBSERVED :
Rodent - mouse
DOSE/DURATION :
482 mg/kg
TOXIC EFFECTS :
Details of toxic effects not reported other than lethal dose value
TYPE OF TEST :
TDLo - Lowest published toxic dose
ROUTE OF EXPOSURE :
Oral
SPECIES OBSERVED :
Rodent - rat
DOSE/DURATION :
1050 mg/kg/35D-I
TOXIC EFFECTS :
Endocrine - changes in thymus weight Blood - normocytic anemia Blood - other changes

MUTATION DATA

TYPE OF TEST :
DNA damage
TEST SYSTEM :
Human Leukocyte
DOSE/DURATION :
15 mg/L
REFERENCE :
CNREA8 Cancer Research. (Public Ledger Building, Suit 816, 6th & Chestnut Sts., Philadelphia, PA 19106) V.1- 1941- Volume(issue)/page/year: 48,3094,1988

 Synthetic Route

 Synonyms

(2R)-2-[2-(4-Chlorophenyl)-1,3-benzoxazol-5-yl]propanoic acid
Uniprofen
Benoxaprofen
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