Isatoic Anhydride - ≥98%(HPLC)(T) , CAS No.118-48-9

CAS: 118-48-9 Cat. No.: I157688 Formula: C8H5NO3 Molecular Weight: 163.13 Beilstein Registry Number: 27264 EC Number: 204-255-0
AVAILABLE TO ORDER
GRADE & PURITY ≥98%(HPLC)(T)
Synonyms
ISATOIC ACID ANHYDRIDE [HSDB]|2,4-dioxo-1H-3,1-benzoxazine|ISATOIC ACID ANHYDRIDE|1H-[3,1]benzoxazine-2,4-dione|Isatoic anhydride treated BSA|4H-3,1-Benzoxazine-2,4(1H)-dione|Anthranilic acid N-carboxylic acid anhydride|1,2-dihydro-3,1-benzoxazine-2,4-dione|ISATOIC ACID,ANHYDRIDE|1H-benzo[d][1,3]oxazin-2,4-dione|3,1-Benzoxazine-2,4(1H)-dione|3,1-Benzoxazin-2,4-(1H)-dione|2H-3,1-benzoxazine-2,4-(1H)-dione|2H-3,1-Benzoxazine-2,4(1H)-dione|Anthranilic acid, cyclic anhydride|1H-3,1-benzoxazine-2,4-dione;Isatoic anhydride|2H-3,4(1H)-dione|Benzoic acid, 2-(carboxyamino)-, cyclic anhydride|Isato acid anhydride|2,4-dihydro-1H-3,1-benzoxazine-2,4-dione|2,4-dioxo-1,2-dihydro-4h-3,1-benzoxazine|1h-benzo[d][1,3]oxazine-2,4dione|1H-Benzo[d][1,3]oxazine-2,4-dione|1h-benz(d)(1,3)oxazine-2,4-dione|1H-3,1-benzoxazine-2,4-dione|Anthranilic acid, N-carboxy-, cyclic anhydride|Isatoic anhydride
Storage
Room temperature,Argon charged
Shipped In
Normal
★
Size
USA
Germany (EU)*
Price
Qty
25g
I157688-25g
Made to order · 8–12 wks

$11.90

$17.90
Save $6.00 (33.52%)
100g
I157688-100g
3 In stock
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$14.90

$22.90
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250g
I157688-250g
4 In stock
—

$16.90

$25.90
Save $9.00 (34.75%)
500g
I157688-500g
3 In stock
—

$18.90

$28.90
Save $10.00 (34.60%)
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Specifications

Synonyms
ISATOIC ACID ANHYDRIDE [HSDB] | 2,4-dioxo-1H-3,1-benzoxazine | ISATOIC ACID ANHYDRIDE | 1H-[3,1]benzoxazine-2,4-dione | Isatoic anhydride treated BSA | 4H-3,1-Benzoxazine-2,4(1H)-dione | Anthranilic acid N-carboxylic acid anhydride | 1,2-dihydro-3,1-benzoxazine-2,4-dione | ISATOIC ACID,ANHYDRIDE | 1H-benzo[d][1,3]oxazin-2,4-dione | 3,1-Be Show more
Specifications & Purity
≥98%(HPLC)(T)
Storage
Room temperature,Argon charged
Shipped In
Normal
Purity
≥98%(HPLC)(T)
Names and Identifiers
Pubchem Sid
Pubchem Sid Url
https://pubchem.ncbi.nlm.nih.gov/substance/504751654
Canonical Smiles
C1=CC=C2C(=C1)C(=O)OC(=O)N2
IUPAC Name
1H-3,1-benzoxazine-2,4-dione
InChIKey
TXJUTRJFNRYTHH-UHFFFAOYSA-N
INCHI
1S/C8H5NO3/c10-7-5-3-1-2-4-6(5)9-8(11)12-7/h1-4H,(H,9,11)
Isomeric SMILES
C1=CC=C2C(=C1)C(=O)OC(=O)N2
RTECS
DM3100000
Molecular Weight
163.13
Beilstein
27264
Reaxy-Rn
136786
Reaxys-RN_link_address
https://www.reaxys.com/reaxys/secured/hopinto.do?context=S&query=IDE.XRN=136786&ln=

Advanced Data

Taxonomic Classification

Taxonomy Tree

KingdomOrganic compounds
SuperclassOrganoheterocyclic compounds
ClassBenzoxazines
SubclassNot available
Intermediate Tree Nodes Not available
Direct ParentBenzoxazines
Alternative Parents Benzenoids  Vinylogous amides  Heteroaromatic compounds  Lactones  Oxacyclic compounds  Azacyclic compounds  Organopnictogen compounds  Organooxygen compounds  Organonitrogen compounds  Organic oxides  Hydrocarbon derivatives  
Molecular FrameworkAromatic heteropolycyclic compounds
Substituents Benzoxazine - Benzenoid - Heteroaromatic compound - Vinylogous amide - Lactone - Oxacycle - Azacycle - Organic nitrogen compound - Organic oxygen compound - Organopnictogen compound - Organic oxide - Hydrocarbon derivative - Organooxygen compound - Organonitrogen compound - Aromatic heteropolycyclic compound
DescriptionThis compound belongs to the class of organic compounds known as benzoxazines. These are organic compounds containing a benzene fused to an oxazine ring (a six-membered aliphatic ring with four carbon atoms, one oxygen atom, and one nitrogen atom).
External Descriptors Not available
3D Structure
Interactive Chemical Structure Model





Mechanisms of Action
Certificates (CoA,COO,BSE/TSE and Analysis Chart)
C of A & Other Certificates(BSE/TSE, COO):
Analytical Chart:

Find and download the COA for your product by matching the lot number on the packaging.

15 results found

Lot NumberCertificate TypeDateItem
J2612103J2612103Certificate of AnalysisOct 16, 2026 I157688
B2225436B2225436Certificate of AnalysisDec 09, 2025 I157688
B2225545B2225545Certificate of AnalysisDec 09, 2025 I157688
H2514140H2514140Certificate of AnalysisAug 20, 2025 I157688
E1712171E1712171Certificate of AnalysisJan 07, 2025 I157688
J2019240J2019240Certificate of AnalysisAug 13, 2024 I157688
J2019241J2019241Certificate of AnalysisAug 13, 2024 I157688
J2019242J2019242Certificate of AnalysisAug 13, 2024 I157688
G2418247G2418247Certificate of AnalysisApr 28, 2024 I157688
G2418248G2418248Certificate of AnalysisApr 28, 2024 I157688
G2415253G2415253Certificate of AnalysisApr 28, 2024 I157688
G2415254G2415254Certificate of AnalysisApr 28, 2024 I157688
B2225437B2225437Certificate of AnalysisDec 16, 2021 I157688
B2225530B2225530Certificate of AnalysisDec 16, 2021 I157688
F2519784F2519784Certificate of AnalysisDec 16, 2021 I157688
Chemical and Physical Properties
SensitivityMoisture sensitive
Melt Point(°C)233°C
Molecular Weight163.130 g/mol
XLogP31.000
Hydrogen Bond Donor Count1
Hydrogen Bond Acceptor Count3
Rotatable Bond Count0
Exact Mass163.027 Da
Monoisotopic Mass163.027 Da
Topological Polar Surface Area55.400 Ų
Heavy Atom Count12
Formal Charge0
Complexity226.000
Isotope Atom Count0
Defined Atom Stereocenter Count0
Undefined Atom Stereocenter Count0
Defined Bond Stereocenter Count0
Undefined Bond Stereocenter Count0
The total count of all stereochemical bonds0
Covalently-Bonded Unit Count1
Documents & Articles
Solution Calculators
Reviews

Customer Reviews

Frequently Asked Questions

What is the purity of this product, and how is it determined?
This product is supplied at ≥98% purity, determined by HPLC. Lot-specific values are stated on the Certificate of Analysis.
How should this product be stored?
Store at room temperature under argon. It is supplied under an argon blanket; reseal under inert gas after each use.
How is this product shipped?
This product ships under standard ambient conditions. No temperature-controlled packaging is required.
What are the CAS number, molecular formula and molecular weight?
The CAS Number is 118-48-9, the molecular formula is C8H5NO3, and the molecular weight is 163.13 g/mol. InChIKey TXJUTRJFNRYTHH-UHFFFAOYSA-N.
What documentation is provided?
Available product documentation, including Certificates of Analysis (COA), Safety Data Sheets (SDS), and specification sheets, is shown in the product document area. Document availability and access follow the current site policy.

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