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2,3-Dimethylmaleic anhydride, 97% - CAS 766-39-2 - Formula C6H6O3


Certificate of Analysis

2,3-Dimethylmaleic anhydride, 97%

CAS: 766-39-2 MDL: MFCD00005523  EINECS: 212-165-8
Not regulated for shipping
Alternate Name: 3,4-Dimethyl-2,5-furandione


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Chemical Properties

Formula: C6H6O3  Boiling point: 222-223°
Formula weight: 126.11  Sensitivity: Moisture Sensitive
Melting point: 93-96° 

Literature References

Does not undergo Diels-Alder reactions with furan, but does react with 1,3-Diphenyl­isobenzofuran, L00101, to give benzocantharadin: J. Org. Chem., 47, 4011 (1982).

The use of the dimethylmaleoyl (DMM) group has been investigated for amino group protection in oligosaccharide synthesis. The DMM group is introduced using triethylamine as base. It promotes ß -linkage by neighboring group participation and is stable to acids and non-nucleophilic bases. Cleavage can be brought about by treatment with dilute aqueous NaOH: Eur. J. Org. Chem., 2305 (1998).

Other References

Beilstein: 112044
Harmonized Tariff Code:   2917.19

GHS Hazard and Precautionary Statements

Hazard Statements : H315-H319-H335

Causes skin irritation. Causes serious eye irritation. May cause respiratory irritation.

Precautionary Statements : P261-P280-P305+P351+P338-P304+P340-P405-P501A

Avoid breathing dust/fume/gas/mist/vapours/spray. Wear protective gloves/protective clothing/eye protection/face protection. IF IN EYES: Rinse cautiously with water for several minutes. Remove contact lenses, if present and easy to do. Continue rinsing. IF INHALED: Remove to fresh air and keep at rest in a position comfortable for breathing. Store locked up. Dispose of contents/container in accordance with local/regional/national/international regulations.

Harmful or Irritant

Risk & Safety

Risk Phrases: 36/37/38
Irritating to eyes, respiratory system and skin.
Safety Phrases: 26-37
In case of contact with eyes, rinse immediately with plenty of water and seek medical advice. Wear suitable gloves.
RTECS: ON4025000