Isatoic anhydride

Description

Isatoic anhydride · CAS 118-48-9 · C8H5NO3. UNII R8TFA74Y4U.

Identification

CAS Registry Number	118-48-9
PubChem CID	8359
Molecular formula	C8H5NO3
IUPAC name	1H-3,1-benzoxazine-2,4-dione
UNII (FDA)	R8TFA74Y4U

Computed Descriptors

Molecular Weight	163.13
XLogP3	1
Hydrogen Bond Donor Count	1
Hydrogen Bond Acceptor Count	3
Rotatable Bond Count	0
Exact Mass	163.026943022
Monoisotopic Mass	163.026943022
Topological Polar Surface Area	55.4
Heavy Atom Count	12
Formal Charge	0

Physical description & handling notes

• Dry Powder
• Tan solid; [Hawley] Grey powder; [MSDSonline]
• PRISM FROM ALC OR GLACIAL ACETIC ACID; CRYSTALS FROM ALCOHOL OR DIOXANE
• TAN POWDER
• 243 °C WITH DECOMPOSITION
• MISCIBLE IN WATER, HOT ALC, AND ACETONE; INSOL IN ETHER, BENZENE, AND CHLOROFORM

Regulatory Status

GHS notification summary	5.2% (11 / 210)

GHS Hazard Classification

GHS notification summary	5.2% (11 / 210)
Reported hazard statements	H317, H319

Documented Uses

• Plastic Composites Manufacturing [Category: Industry]
• INTERMEDIATE FOR POLYMER CURING AGENTS, ANTHRANILIC ESTERS, HETEROCYCLIC COMPD, & BENZYNE
• Not Known or Reasonably Ascertainable
• PASSING PHOSGENE INTO A SOLUTION OF ANTHRANILIC ACID IN AQUEOUS HYDROCHLORIC ACID
• (1977) PROBABLY GREATER THAN 2.27X10+6 GRAMS
• (1979) PROBABLY GREATER THAN 2.27X10+6 GRAMS

Synonyms

Isatoic anhydride; 118-48-9; 2H-3,1-Benzoxazine-2,4(1H)-dione; ISATOIC ACID ANHYDRIDE; 4H-3,1-Benzoxazine-2,4(1H)-dione; N-Carboxyanthranilic anhydride; DTXSID6026955; 3,1-Benzoxazine-2,4(1H)-dione; Anthranilic acid, N-carboxy-, cyclic anhydride; Benzoic acid, 2-(carboxyamino)-, cyclic anhydride; R8TFA74Y4U; 2,4-dihydro-1H-3,1-benzoxazine-2,4-dione; 1,2-dihydro-3,1-benzoxazine-2,4-dione; NSC-29555; 1h-benz(d)(1,3)oxazine-2,4-dione; NSC-104662

Frequently Asked Questions

What are the CAS number and molecular formula of Isatoic anhydride?

CAS 118-48-9; molecular formula C8H5NO3; molecular weight — g/mol.

What other names is Isatoic anhydride known by?

Isatoic anhydride, 118-48-9, 2H-3,1-Benzoxazine-2,4(1H)-dione, ISATOIC ACID ANHYDRIDE, 4H-3,1-Benzoxazine-2,4(1H)-dione, N-Carboxyanthranilic anhydride.

Is Isatoic anhydride classified as hazardous?

5.2% of GHS notifications report no hazard classification (11 of 210).

Facts on this page are taken from PubChem (US National Library of Medicine) and Wikidata. Grade-specific data — assay, moisture, particle size, packaging, shelf life — is issued per batch on the COA and is not published here.