4H-1,3-BENZOXAZIN-4-ONE, 2,3-DIHYDRO-2-METHYL-

Modify Date: 2025-08-29 23:02:41

4H-1,3-BENZOXAZIN-4-ONE, 2,3-DIHYDRO-2-METHYL- Structure
4H-1,3-BENZOXAZIN-4-ONE, 2,3-DIHYDRO-2-METHYL- structure
 Common Name 4H-1,3-BENZOXAZIN-4-ONE, 2,3-DIHYDRO-2-METHYL-
CAS Number 20602-57-7 Molecular Weight 163.17300
Density 1.166g/cm3 Boiling Point 387.5ºC at 760 mmHg
Molecular Formula C9H9NO2 Melting Point N/A
MSDS N/A Flash Point 188.2ºC

 Names

Name 2-methyl-2,3-dihydro-1,3-benzoxazin-4-one
Synonym More Synonyms

 Chemical & Physical Properties

Density 1.166g/cm3
Boiling Point 387.5ºC at 760 mmHg
Molecular Formula C9H9NO2
Molecular Weight 163.17300
Flash Point 188.2ºC
Exact Mass 163.06300
PSA 38.33000
LogP 1.48360
Vapour Pressure 3.28E-06mmHg at 25°C
Index of Refraction 1.536
InChIKey MOFJSTXFUSYCDO-UHFFFAOYSA-N
SMILES CC1NC(=O)c2ccccc2O1

 Toxicological Information

CHEMICAL IDENTIFICATION

RTECS NUMBER :
DM3843200
CHEMICAL NAME :
4H-1,3-Benzoxazin-4-one, 2,3-dihydro-2-methyl-
CAS REGISTRY NUMBER :
20602-57-7
BEILSTEIN REFERENCE NO. :
0140346
LAST UPDATED :
199612
DATA ITEMS CITED :
1
MOLECULAR FORMULA :
C9-H9-N-O2
MOLECULAR WEIGHT :
163.19
WISWESSER LINE NOTATION :
T66 BO DMV CHJ C1

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 :
1025 mg/kg
TOXIC EFFECTS :
Biochemical - Metabolism (Intermediary) - effect on inflammation or mediation of inflammation
REFERENCE :
JPPMAB Journal of Pharmacy and Pharmacology. (Pharmaceutical Soc. of Great Britain, 1 Lambeth High St., London SEI 7JN, UK) V.1- 1949- Volume(issue)/page/year: 16,502,1964

 Synthetic Route

2-methyl-1,3-benzoxazin-4-one,perchloric acid structure

2-methyl-1,3-be...

CAS#:54789-70-7

~65%

4H-1,3-BENZOXAZIN-4-ONE, 2,3-DIHYDRO-2-METHYL- Structure

4H-1,3-BENZOXAZ...

CAS#:20602-57-7

Literature: Vikrishchuk; Ryabukhin Russian Journal of General Chemistry, 2009 , vol. 79, # 7 p. 1509 - 1512
Salicylhydrazide structure

Salicylhydrazide

CAS#:936-02-7

Acetylene structure

Acetylene

CAS#:74-86-2

~1%

4H-1,3-BENZOXAZIN-4-ONE, 2,3-DIHYDRO-2-METHYL- Structure

4H-1,3-BENZOXAZ...

CAS#:20602-57-7

Literature: Skvortsova, G. G.; Andriyankova, L. V.; Stepanova, Z. V. Bulletin of the Academy of Sciences of the USSR, Division of Chemical Science (English Translation), 1983 , vol. 32, # 10 p. 2153 - 2155 Izvestiya Akademii Nauk SSSR, Seriya Khimicheskaya, 1983 , # 10 p. 2389 - 2391
vinyl acetate structure

vinyl acetate

CAS#:108-05-4

Salicylamide structure

Salicylamide

CAS#:65-45-2

~%

4H-1,3-BENZOXAZIN-4-ONE, 2,3-DIHYDRO-2-METHYL- Structure

4H-1,3-BENZOXAZ...

CAS#:20602-57-7

Literature: Mowry; Yanko; Ringwald Journal of the American Chemical Society, 1947 , vol. 69, p. 2358,2360
Salicylamide structure

Salicylamide

CAS#:65-45-2

paraldehyde structure

paraldehyde

CAS#:123-63-7

~%

4H-1,3-BENZOXAZIN-4-ONE, 2,3-DIHYDRO-2-METHYL- Structure

4H-1,3-BENZOXAZ...

CAS#:20602-57-7

Literature: Hicks Journal of the Chemical Society, 1910 , vol. 97, p. 1033

 Synonyms

2-Methyl-3,4-dihydro-1,3-benzoxazine-4-one
2-methyl-2,3-dihydro-4H-1,3-benzoxazin-4-one
4H-1,3-BENZOXAZIN-4-ONE,2,3-DIHYDRO-2-METHYL
4-Oxo-2-methyl-5,6-benzo-1,3-oxazin
2,3-Dihydro-2-methyl-4H-1,3-benzoxazin-4-one
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Chemsrc provides CAS#:20602-57-7 MSDS, density, melting point, boiling point, structure, etc. Its name is 4H-1,3-BENZOXAZIN-4-ONE, 2,3-DIHYDRO-2-METHYL->> amp version: 4H-1,3-BENZOXAZIN-4-ONE, 2,3-DIHYDRO-2-METHYL-

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