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935-79-5

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High purity cis-1,2,3,6-Tetrahydrophthalic anhydride 98% TOP1 supplier in China
Cas No: 935-79-5
USD $ 3.0-3.0 / Gram 100 Gram 1-100 Metric Ton/Month Dayang Chem (Hangzhou) Co.,Ltd. Contact Supplier
High quality Tetrahydrophthalic Anhydride supplier in China
Cas No: 935-79-5
No Data 1 Metric Ton 30 Metric Ton/Month Simagchem Corporation Contact Supplier
Cis-1,2,3,6-Tetrahydrophthalic Anhydride CAS 85-43-8/935-79-5
Cas No: 935-79-5
USD $ 3300.0-3500.0 / Gram 250 Gram 100 Metric Ton/Month Hebei yanxi chemical co.,LTD. Contact Supplier
cis-1,2,3,6-Tetrahydrophthalic anhydride
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High Quality 99% 935-79-5 cis-1,2,3,6-Tetrahydrophthalic anhydride Manufacturer
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USD $ 0.1-0.1 / Gram 1 Gram 100 Metric Ton/Year Xi'an Xszo Chem Co., Ltd. Contact Supplier
THPA
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USD $ 2.0-3.0 / Kilogram 1 Kilogram 50 Metric Ton/Day EAST CHEMSOURCES LIMITED Contact Supplier
Amadis Chemical offer CAS#935-79-5;CAT#A844640
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No Data 10 Milligram Amadis Chemical Co., Ltd. Contact Supplier
Tetrahydrophthalic Anhydride(THPA 935-79-5)
Cas No: 935-79-5
USD $ 1.0-1.0 / Metric Ton 1 Metric Ton 200 Metric Ton/Month Henan Sinotech Import&Export Corporation Contact Supplier
Manufacturer supply CAS 935-79-5 with best quality
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USD $ 139.0-210.0 / Kilogram 1 Kilogram 1000 Kilogram/Day Zhuozhou Wenxi import and Export Co., Ltd Contact Supplier
Tetrahydrophthalic anhydride CAS 935-79-5
Cas No: 935-79-5
No Data 2 Metric Ton 5 Metric Ton/Day Henan Tianfu Chemical Co., Ltd. Contact Supplier

935-79-5 Usage

Preparation

A flask containing 500 ml of dry benzene and 196 gm (2 moles) of maleic anhydride is heated with a pan of hot water while butadiene is introduced rapidly (0.6-0.8 liter/min) from a commercial cylinder. The solution is stirred rapidly and the heating is stopped after 3-5 min when the temperature reaches 50°C. In 15-25 min the reaction causes the temperature of the solution to reach 70-75°C. The absorption of the rapid stream of butadiene is nearly complete in 30-40 min. The addition of butadiene is continued at a slower rate for a total of 2\ hr. The solution is poured into a 1-liter beaker which is covered and kept at 0-5°C overnight. The product is collected on a large Buchner funnel and washed with 250 ml of b.p. 35-60°C petroleum ether. A second crop is obtained by diluting the filtrate with an additional 250 ml of petroleum ether. Both crops are dried to constant weight in an oven at 70-80°C to yield 281.5-294.5 gm (96- 97%, m.p. 99-102°C). Recrystallization from ligroin or ether raises the melting point to 103-104°C.

Chemical Properties

WHITE FLAKES

Synthesis Reference(s)

Journal of the American Chemical Society, 64, p. 802, 1942 DOI: 10.1021/ja01256a018
InChI:InChI=1/C8H8O3/c9-7-5-3-1-2-4-6(5)8(10)11-7/h1,3,5-6H,2,4H2

935-79-5 Well-known Company Product Price

Brand (Code)Product description CAS number Packaging Price Detail
Alfa Aesar (B21431)  cis-4-Cyclohexene-1,2-dicarboxylic anhydride, 95%    935-79-5 250g 191.0CNY Detail
Alfa Aesar (B21431)  cis-4-Cyclohexene-1,2-dicarboxylic anhydride, 95%    935-79-5 1000g 266.0CNY Detail
Aldrich (136891)  cis-1,2,3,6-Tetrahydrophthalicanhydride  95% 935-79-5 136891-100G 478.53CNY Detail
Aldrich (136891)  cis-1,2,3,6-Tetrahydrophthalicanhydride  95% 935-79-5 136891-1KG 731.25CNY Detail
Aldrich (136891)  cis-1,2,3,6-Tetrahydrophthalicanhydride  95% 935-79-5 136891-2.5KG 822.51CNY Detail

935-79-5SDS

SAFETY DATA SHEETS

According to Globally Harmonized System of Classification and Labelling of Chemicals (GHS) - Sixth revised edition

Version: 1.0

Creation Date: Aug 12, 2017

Revision Date: Aug 12, 2017

1.Identification

1.1 GHS Product identifier

Product name Cis-1,2,3,6-Tetrahydrophthalic Anhydride

1.2 Other means of identification

Product number -
Other names (3aS,7aR)-3a,4,7,7a-tetrahydro-2-benzofuran-1,3-dione

1.3 Recommended use of the chemical and restrictions on use

Identified uses For industry use only. Ion exchange agents
Uses advised against no data available

1.4 Supplier's details

1.5 Emergency phone number

Emergency phone number -
Service hours Monday to Friday, 9am-5pm (Standard time zone: UTC/GMT +8 hours).

More Details:935-79-5 SDS

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