cis-1,2,3,6-Tetrahydrophthalic anhydride CAS#935-79-5

  • CAS Number:  935-79-5

  • Chemical Formula:  C8H8O3

  • Synonyms:

    • CIS-4-CYCLOHEXEN-1,2-DIMETHANOIC ANHYDRIDE

    • CIS-4-TETRAHYDROPHTHALIC ANHYDRIDE

    • CIS-DELTA4-TETRAHYDROPHTHALIC ANHYDRIDE

    Appearance: White Powder

  • MOQ (Minimum Order Quantity): 1 FCL (Full Container Load)



Product Details

cis-1,2,3,6-Tetrahydrophthalic anhydride CAS#935-79-5

Tetrahydrophthalic anhydride is an organic compound with the formula C6H8C2O3. The compound exists as two isomers, this article being focused on the more common cis isomer. It is a precursor to other compounds including the dicarboxylic acid tetrahydrophthalic acid as well the tetrahydrophthalimide, which is a precursor to the fungicide Captan. It is a white solid that is soluble in organic solvents.
Tetrahydrophthalic anhydride, the cis isomer, is prepared by the Diels-Alder reaction of butadiene and maleic anhydride.

cis-1,2,3,6-Tetrahydrophthalic anhydride Chemical Properties

Melting point 

98 °C

Boiling point 

234.6°C (rough estimate)

density 

1.2143 (rough estimate)

vapor density 

5.2 (vs air)

vapor pressure 

<0.01 mm Hg ( 20 °C)

refractive index 

1.4447 (estimate)

Fp 

156 °C

storage temp. 

under inert gas (nitrogen or Argon) at 2-8°C

solubility 

soluble in Toluene,Benzene

form 

powder to crystal

color 

White to Almost white

Water Solubility 

REACTS

Sensitive 

Moisture Sensitive

BRN 

82341

Exposure limits

ACGIH: TWA 0.01 mg/m3
OSHA: TWA 0.25 ppm(1 mg/m3)
NIOSH: IDLH 10 mg/m3; TWA 0.25 ppm(1 mg/m3)

InChI

1S/C8H8O3/c9-7-5-3-1-2-4-6(5)8(10)11-7/h1-2,5-6H,3-4H2/t5-,6+

InChIKey

KMOUUZVZFBCRAM-OLQVQODUSA-N

SMILES

[H][C@@]12CC=CC[C@]1([H])C(=O)OC2=O

CAS DataBase Reference

935-79-5(CAS DataBase Reference)

NIST Chemistry Reference

cis-1,2,3,6-Tetrahydrophthalic anhydride(935-79-5)

EPA Substance Registry System

1,3-Isobenzofurandione, 3a,4,7,7a-tetrahydro-, (3aR,7aS)-rel- (935-79-5)


Safety Information

Hazard Codes 

Xn

Risk Statements 

41-42/43-52/53

Safety Statements 

22-24-26-37/39-61-52/53-42/43-41

RIDADR 

UN 2698 8/PG 3

WGK Germany 

3

RTECS 

GW5775000

TSCA 

TSCA listed

HazardClass 

8

PackingGroup 

III

HS Code 

29173990

Storage Class

8A - Combustible corrosive hazardous materials

Hazard Classifications

Aquatic Chronic 3
Eye Dam. 1
Resp. Sens. 1
Skin Sens. 1


Product Application of cis-1,2,3,6-Tetrahydrophthalic anhydride CAS#935-79-5

Tetrahydrophthalic Anhydride is an anhydride hardener mainly used in the fields of coatings, epoxy resin curing agents, polyester resins, adhesives, plasticizers, pesticides, etc. It is also used as a chemical intermediate for light colored alkyds.
Tetrahydrophthalic Anhydride is an organic compound obtained from the reaction of Maleic Anhydride and Butadiene.


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