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Impurities and reference standards

Himic anhydride

Also known as 4,7-Methanoisobenzofuran-1,3-dione, 3a,4,7,7a-tetrahydro-, (3aR,4R,7S,7aS)-rel-, exo-3,6-Methylene-1,2,3,6-tetrahydrophthalic anhydride, (1alpha,2alpha,3beta,6beta)-1,2,3,6-tetrahydro-3,6-methanophthalic anhydride

CAS 2746-19-2Formula C9H8O3Molar mass 164.16 g/molEC 220-384-5
GHS signal word: Danger. Pictograms: Corrosive, Serious health hazard 8 suppliers listed
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Himic anhydride chemical structure, C9H8O3, CAS 2746-19-2
2D chemical structure

Key facts

What buyers check first

All properties
CAS number
2746-19-2
Formula
C9H8O3
Molar mass
164.16 g/mol
EC number
220-384-5
HS code
291720
Category
Impurities and reference standards

What is Himic anhydride?

Plain description, key identifiers and synonyms

Himic anhydride is a chemical substance with the molecular formula C9H8O3 and a molar mass of 164.16 g/mol. Its CAS registry number is 2746-19-2. The IUPAC name is (1R,2R,6S,7S)-4-oxatricyclo[5.2.1.02,6]dec-8-ene-3,5-dione.

Identifiers

Registry numbers, names and line notations, tap to copy

IUPAC name
(1R,2R,6S,7S)-4-oxatricyclo[5.2.1.02,6]dec-8-ene-3,5-dione
CAS number
2746-19-2 CAS number cross-checked
EC number
220-384-5
Molecular formula
C9H8O3
UNII
N1KQO6559B
MDL number
MFCD00630580
InChIKey
KNDQHSIWLOJIGP-RNGGSSJXSA-N
InChI
InChI=1S/C9H8O3/c10-8-6-4-1-2-5(3-4)7(6)9(11)12-8/h1-2,4-7H,3H2/t4-,5+,6+,7-
Canonical SMILES
O=C1OC(=O)C2C3C=CC(C3)C12
Isomeric SMILES
C1[C@@H]2C=C[C@H]1[C@H]3[C@@H]2C(=O)OC3=O

Synonyms

  • 4,7-Methanoisobenzofuran-1,3-dione, 3a,4,7,7a-tetrahydro-, (3aR,4R,7S,7aS)-rel-
  • exo-3,6-Methylene-1,2,3,6-tetrahydrophthalic anhydride
  • (1alpha,2alpha,3beta,6beta)-1,2,3,6-tetrahydro-3,6-methanophthalic anhydride
  • (3aR,4R,7S,7aS)-rel-3a,4,7,7a-Tetrahydro-4,7-methanoisobenzofuran-1,3-dione
  • cis-5-Norbornene-exo-2,3-dicarboxylic anhydride
  • cis-Norbornene-exo-2,3-dicarboxylic Anhydride
  • (1S,2S,6R,7R)-4-oxatricyclo[5.2.1.02,6]dec-8-ene-3,5-dione
  • 4,7-Methanoisobenzofuran-1,3-dione, 3a,4,7,7a-tetrahydro-,(3aR,4R,7S,7aS)-rel-
  • (3aR,4R,7S,7AS)-3a,4,7,7a-tetrahydro-4,7-methanoisobenzofuran-1,3-dione
  • exo-5-Norbornene-2,3-dicarboxylic anhydride
  • endicanhydride
  • Lurasidone Impurity 94
  • cis-endo-5-Norbornene-2,3-dicarboxylic anhydride
  • exo-Nadic anhydride
  • exo-Carbic anhydride
  • 5-Norbornene-2,3-dicarboxylic anhydride, cis-exo-
  • (1R,2R,6S,7S)-4-Oxatricyclo[5.2.1.02,6]dec-8-ene-3,5-dione
  • exo-5-Norbornene-1,2-dicarboxylic Anhydride
  • (cis)-5-Norbornene-endo-2,3-dicarboxylic anhydride
  • cis-5-Norbornene-exo-2,3-dicarboxylic anhydride, 95%
  • 5-Norbornene-2,3-dicarboxylic anhydride, exo-cis-
  • exo-3,6-methylene-1,2,3,6-tetrahydrophth alic anhydride
  • exo-3,6-Methylene-4-cyclohexene-1,2-dicarboxylic Anhydride
  • Di-exo-bicyclo[2.2.1]hept-5-ene-2,3-dicarboxylic anhydride
  • Norborn-5-ene-2,3-dicarboxylic anhydride 2-exo, 3-exo isomere
Show all 32 synonyms
  • rel-(1R,2R,6S,7S)-4-oxatricyclo[5.2.1.0(2)]dec-8-ene-3,5-dione
  • (1alpha,2alpha,3beta,6beta)-1,2,3,6-Tetrahydro-3,6-methanophthalicanhydride
  • (3aR,4R,7S,7aS)-3a,4,7,7a-Tetrahydro-4,7-methano-2-benzofuran-1,3-dione
  • (3Ar,7S,7as)-3a,4,7,7a-tetrahydro-4,7-methanoisobenzofuran-1,3-dione
  • 4,7-methanoisobenzofuran-1,3-dione, 3a,4,7,7a-tetrahydro-, (3aR,4R,7S,7aS)-
  • rel-(3aR,4R,7S,7aS)-3a,4,7,7a-tetrahydro-4,7-methano-2-benzofuran-1,3-dione
  • 4,7-Methanoisobenzofuran-1,3-dione, 3a,4,7,7a-tetrahydro-, (3aalpha,4beta,7beta,7aalpha)-

Physical and chemical properties

Measured values and descriptors computed from the structure

Physical and chemical properties

Measured values, check the supplier specification for your grade

No measured properties are recorded for this substance yet. Ask suppliers for a technical data sheet.

Values vary by grade. Ask suppliers for the COA or TDS of the batch you buy.

Computed descriptors

Calculated from the structure, useful for screening and formulation

Molecular weight
164.16 g/molcalc.
Exact mass
164.0473 Dacalc.
LogP (octanol/water)
0.51calc.
Topological polar surface area
43.37 Ųcalc.
Hydrogen bond donors
0calc.
Hydrogen bond acceptors
3calc.
Rotatable bonds
0calc.
Heavy atoms
12calc.
Rings
3calc.
Aromatic rings
0calc.
Fraction sp3 carbons
0.56calc.
Formal charge
0calc.
Stereocentres
4calc.
Lipinski rule of five
Passes (0 violations)calc.

Calculated for screening. Confirm critical figures with the supplier.

Murcko scaffold

The ring system that remains when every side chain is removed

Murcko scaffold of this chemical, O=C1OC(=O)C2C3C=CC(C3)C12

O=C1OC(=O)C2C3C=CC(C3)C12

3 rings, 12 atoms, the 5-Norbornene-2,3-dicarboxylic anhydride ring system.

22 other chemicals share this scaffold

Safety and hazards

GHS classification summary, not a safety data sheet

GHS signal word
Danger
GHS05: Corrosive
Corrosive
GHS08: Serious health hazard
Serious health hazard

Hazard statements

  • H317May cause an allergic skin reaction.
  • H318Causes serious eye damage.
  • H334May cause allergy or asthma symptoms or breathing difficulties if inhaled.
Precautionary statements (18)
  • P233Keep container tightly closed.
  • P260Do not breathe dust, fume, gas, mist, vapours or spray.
  • P261Avoid breathing dust, fume, gas, mist, vapours or spray.
  • P264 + P265Wash skin thoroughly after handling. Do not touch eyes.
  • P271Use only outdoors or in a well-ventilated area.
  • P272Contaminated work clothing should not be allowed out of the workplace.
  • P280Wear protective gloves, protective clothing, eye protection and face protection.
  • P284In case of inadequate ventilation wear respiratory protection.
  • P302 + P352If on skin: Wash with plenty of water.
  • P304 + P340If inhaled: Remove person to fresh air and keep comfortable for breathing.
  • P305 + P354 + P338If in eyes: Immediately rinse with water for several minutes. Remove contact lenses, if present and easy to do. Continue rinsing.
  • P317Get medical help.
  • P321Specific treatment (see supplemental first aid instructions on the label).
  • P333 + P317If skin irritation or rash occurs: Get medical help.
  • P342 + P316If experiencing respiratory symptoms: Get emergency medical help immediately.
  • P362 + P364Take off contaminated clothing. And wash it before reuse.
  • P403Store in a well-ventilated place.
  • P501Dispose of contents and container in accordance with local regulations.

GHS classification summary, not a safety data sheet (SDS). Classifications can differ by supplier, grade and concentration. Always check the supplier's SDS.

Full safety data and first aid

Himic anhydride suppliers

Sponsored listings first, then the documented ranking: membership, verification, replies, completeness, freshness and ratings

All 8 suppliers
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Where suppliers are based

8 suppliers in 1 country

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Himic anhydride price

Indicative price range per kg from live supplier offers

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Uses and applications

What the substance is used for, by industry and function

Applications are not documented for this substance yet. Suppliers often describe uses on their product pages, linked in the suppliers list above.

Regulatory status

Inventories, regulations and trade controls that list this substance

Europe

  • EU harmonised classification (CLP Annex VI)
    Index no: 607-105-00-6[3]

United States

  • TSCA inventory (USA)
    Status: Active in US commerce

HS code and trade data

Customs classification and reported world trade statistics

Global trade

World import and export statistics for the HS code Himic anhydride is traded under.

HS 2917.20Indicative HS code

Cyclanic, cyclenic or cycloterpenic polycarboxylic acids, their anhydrides, halides…

World exports in 2024
$338M
+10.9% vs 2023, imports $464M
2019 to 2024
Top exporters
  1. China37.1%
  2. United States16.2%
  3. Italy15.5%
Top importers
  1. India * partner reported11.6%
  2. China9.4%
  3. Germany8.9%

* Partner reported figures, a lower bound.

Reported customs values in USD, not prices.Full trade data

The HS code shown for Himic anhydride is indicative (it was assigned by structure rules). Confirm the classification with your customs broker before shipping.

Frequently asked questions

Quick answers about Himic anhydride, based on the data on this page

What is Himic anhydride?

Himic anhydride is a chemical substance with the molecular formula C9H8O3 and a molar mass of 164.16 g/mol. Its CAS registry number is 2746-19-2. The IUPAC name is (1R,2R,6S,7S)-4-oxatricyclo[5.2.1.02,6]dec-8-ene-3,5-dione.

What is the CAS number of Himic anhydride?

The CAS registry number of Himic anhydride is 2746-19-2.

What is the molecular formula and weight of Himic anhydride?

The molecular formula of Himic anhydride is C9H8O3 and its molar mass is 164.16 g/mol.

Is Himic anhydride hazardous?

Himic anhydride carries the GHS signal word "Danger". Main hazards: may cause an allergic skin reaction, causes serious eye damage, may cause allergy or asthma symptoms or breathing difficulties if inhaled. This summary is not an SDS, always read the supplier safety data sheet.

What is the HS code of Himic anhydride?

Himic anhydride is usually classified under HS code 291720 (Cyclanic, cyclenic or cycloterpenic polycarboxylic acids, their anhydrides, halides…). This is indicative, confirm it with your customs broker before shipping.

Where can I buy Himic anhydride?

CompoundList lists 8 suppliers of Himic anhydride in China. Send one free request to get and compare quotes. Your contact details stay private until you accept a quote.

What is the price of Himic anhydride?

Suppliers quote Himic anhydride on request because prices depend on grade, purity, quantity and destination. A free request on CompoundList gets you several quotes to compare.

Guides for buyers

Practical guides that help when you source, ship or handle Himic anhydride

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Data last updated 7 Oct 2026. Details may have changed, please confirm them with the supplier. Report an error on this page
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