Isatoic anhydride, 99%

About Isatoic anhydride, 99%

Isatoic anhydride is a monomer in Synthesis grade carrying the CAS registry number 118-48-9, specified at 99% purity. With the molecular formula C8H5NO3, it has a molar mass of 163.13 g/mol. Its systematic (IUPAC) name is 1H-3,1-benzoxazine-2,4-dione. Common synonyms include 3,1-Benzoxazine-2,4(1H)-dione and Anthranilic acid N-carboxylic acid anhydride.

In its supplied form it is white to off-white powder or crystals. Key physical data: a melting point of 233 °C. Store in a tightly closed container in a cool, dry and well-ventilated place. Under GHS it is labelled “Warning”, so handle it with suitable PPE and consult the SDS.

Typical applications include polymerisation, crosslinking and curing, adhesives and coatings and dyes and pigments manufacture. Buyers come mainly from polymers and plastics, paints and coatings and agrochemical production.

Standard pack sizes are 100 g, 500 g, 5 kg and 25 kg, and every batch ships with a Certificate of Analysis (COA) and we export worldwide.

Typical applications

Polymerisation
Crosslinking & curing
Adhesives & coatings
Dyes & pigments manufacture

Industries

Specifications & identifiers

Chemical identifiers
Product name	Isatoic anhydride, 99%
Catalogue No.	VQ-019022
CAS Number	118-48-9
IUPAC name	1H-3,1-benzoxazine-2,4-dione
Molecular formula	C₈H₅NO₃
Molecular weight	163.13 g/mol
Exact mass	163.0269
Grade	Synthesis
Purity / assay	99%
HSN code	32049000
InChIKey	TXJUTRJFNRYTHH-UHFFFAOYSA-N
SMILES	C1=CC=C2C(=C1)C(=O)OC(=O)N2
PubChem CID	8359

Physical properties
Physical form	Crystalline
Appearance	White to off-white powder or crystals
Melting point	233 °C
LogP (XLogP3)	1
H-bond donors / acceptors	1 / 3
TPSA	55.4 Å²
Synonyms	3,1-Benzoxazine-2,4(1H)-dione, Anthranilic acid N-carboxylic acid anhydride, 2H-3,1-Benzoxazine-2,4(1H)-dione, 4H-3,1-Benzoxazine-2,4(1H)-dione, N-Carboxyanthranilic anhydride, Anthranilic acid, N-carboxy-, cyclic anhydride, Benzoic acid, 2-(carboxyamino)-, cyclic anhydride, 2,4-dihydro-1H-3,1-benzoxazine-2,4-dione, 1,2-dihydro-3,1-benzoxazine-2,4-dione, 1h-benz(d)(1,3)oxazine-2,4-dione, 2,4-dioxo-1,2-dihydro-4h-3,1-benzoxazine, 1H-Benzo[d][1,3]oxazine-2,4-dione

Safety & hazard information (GHS)

Harmful / irritant

Signal word: Warning

Hazard statements

H317May cause an allergic skin reaction
H319Causes serious eye irritation

Precautionary statements: P261, P264 + P265, P272, P280, P302 + P352, P305 + P351 + P338, P321, P333 + P317, P337 + P317, P362 + P364, P501

Classification is indicative (aggregated GHS notifications) and may vary by grade and concentration. Always refer to the SDS supplied with your lot.

Documents

Safety Data Sheet (SDS)16-section GHS · on request Certificate of AnalysisTypical / batch COA · on request Specification sheetTDS / MOA · on request

Frequently asked questions

What is the CAS number of Isatoic anhydride, 99%?

The CAS Registry Number of Isatoic anhydride, 99% is 118-48-9. It is also known as 3,1-Benzoxazine-2,4(1H)-dione, Anthranilic acid N-carboxylic acid anhydride, 2H-3,1-Benzoxazine-2,4(1H)-dione.

What is the molecular formula and molecular weight of Isatoic anhydride, 99%?

Isatoic anhydride, 99% has the molecular formula C8H5NO3 and a molecular weight of 163.13 g/mol. Its IUPAC name is 1H-3,1-benzoxazine-2,4-dione.

Which grade and pack sizes of Isatoic anhydride, 99% can I order?

We supply Isatoic anhydride, 99% in Synthesis (99%) grade, in 100 g, 500 g, 5 kg, 25 kg packs. Larger bulk quantities and custom packing are quoted on request.

Do you provide a COA and SDS with Isatoic anhydride, 99%?

Yes. Every lot of Isatoic anhydride, 99% is shipped with a batch-specific Certificate of Analysis, and a 16-section GHS Safety Data Sheet is provided with the quotation and the shipment.

Can Isatoic anhydride, 99% be shipped internationally?

Yes. Isatoic anhydride, 99% is classified as hazardous, so it is packed in UN-approved packaging and shipped as dangerous goods under IATA/IMDG rules. We export worldwide on EXW, FOB, CIF and DAP terms.