85-43-8 Usage
Uses
Chemical intermediate for light-colored alkyds,
polyesters, plasticizers, and adhesives; intermediate
for pesticides; hardener for resins.
Definition
ChEBI: 1,2,3,6-tetrahydrophthalic anhydride is a cyclic dicarboxylic anhydride that is 1,3,3a,4,7,7a-hexahydro-2-benzofuran carrying oxo groups at positions 1 and 3. It is a cyclic dicarboxylic anhydride and a tetrahydrofurandione.
General Description
Clear colorless to light yellow slight viscous liquid. Highly toxic and a strong irritant to skin, eyes and mucous membranes. Corrosive to skin and metal. Used in making polyester, alkyd resins, and plasticizers.
Air & Water Reactions
Reacts exothermically with water to form memtetrahydrophthalic acid.
Reactivity Profile
CIS-1,2,3,6-TETRAHYDROPHTHALIC ANHYDRIDE; >98% is combustible. Reacts with oxidizers. Reacts exothermically with water. These reactions are usually slow, but can become violent when local heating accelerates their rate. Acids accelerate the reaction with water. Incompatible with acids, strong oxidizing agents, alcohols, amines, and bases.
Health Hazard
TOXIC; inhalation, ingestion or skin contact with material may cause severe injury or death. Contact with molten substance may cause severe burns to skin and eyes. Avoid any skin contact. Effects of contact or inhalation may be delayed. Fire may produce irritating, corrosive and/or toxic gases. Runoff from fire control or dilution water may be corrosive and/or toxic and cause pollution.
Fire Hazard
Non-combustible, substance itself does not burn but may decompose upon heating to produce corrosive and/or toxic fumes. Some are oxidizers and may ignite combustibles (wood, paper, oil, clothing, etc.). Contact with metals may evolve flammable hydrogen gas. Containers may explode when heated.
Flammability and Explosibility
Nonflammable
Safety Profile
Moderately toxic by intraperitoneal route. Mildly toxic by ingestion. A corrosive irritant to skin, eyes, and mucous membranes. Combustible when exposed to heat or flame. Will react with water or steam to produce heat; can react with oxidizing materials. To fight fre, use water, foam, CO2, dry chemical. When heated to decomposition it emits acrid smoke and irritating fumes. See also ANHYDRIDES.
Check Digit Verification of cas no
The CAS Registry Mumber 85-43-8 includes 5 digits separated into 3 groups by hyphens. The first part of the number,starting from the left, has 2 digits, 8 and 5 respectively; the second part has 2 digits, 4 and 3 respectively.
Calculate Digit Verification of CAS Registry Number 85-43:
(4*8)+(3*5)+(2*4)+(1*3)=58
58 % 10 = 8
So 85-43-8 is a valid CAS Registry Number.
InChI:InChI=1/C8H8O3/c9-7-5-3-1-2-4-6(5)8(10)11-7/h1,3,5-6H,2,4H2
85-43-8Relevant articles and documents
Method for preparing butane tetracarboxylic dianhydride
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Page/Page column 4-6, (2018/10/11)
The invention discloses a method for preparing butane tetracarboxylic dianhydride, and belongs to the field of fine chemical preparation methods. The method comprises the following steps: using maleicanhydride and 1,3-butadiene as starting materials to synthesize tetrahydrophthalic anhydride as an intermediate product through a 1,4-addition reaction in a high temperature molten state; subjectingtetrahydrophthalic anhydride to hydrolysis, ozone oxidation, hydrogen peroxide oxidation reaction to obtain butane tetracarboxylic acid as an intermediate product; using acetic anhydride or propionicanhydride as a dehydrating agent, and subjecting the butane tetracarboxylic acid to synthesize butane tetracarboxylic dianhydride through dehydration closed-ring. Compared with the traditional process, the method has the advantages of mild reaction conditions, high product purity, high yield, and no pollution, and is suitable for large-scale industrial production.
CATALYST FOR ALKYLATION AND PROCESS FOR PRODUCING ALKYLAROMATIC HYDROCARBON COMPOUND USING THE CATALYST
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Paragraph 0051; 0072, (2013/03/26)
A catalyst for alkylation contains an inorganic structural material having an ion-exchange ability and a metal ion having a valency of 2 or more. The metal ion is supported on the inorganic structural material. The inorganic structural material is preferably a zeolite. The metal ion is preferably a lanthanide metal. The catalyst for alkylation imparts industrially satisfiable activity and selectivity and can be readily separated, collected and recycled. Furthermore, the process for producing an alkylaromatic hydrocarbon compound includes reacting an aromatic hydrocarbon compound and a compound having an unsaturated bond in the presence of the catalyst for alkylation.
Synthetic approach to cis and trans-decalins via Diels - Alder reaction and ring-closing metathesis as key steps: Further extension to dioxapropellane derivative by ring-closing metathesis
Kotha, Sambasivarao,Chavan, Arjun S.,Dipak, Mirtunjay Kumar
scheme or table, p. 501 - 504 (2011/03/18)
9,10-Substituted cis and trans-decalins were synthesized by a simple route using the Diels-Alder reaction and ring-closing metathesis (RCM) as key steps. Later, the cis-decalin system has been extended to 3,8-dioxa[8.4.4]propellane derivative by RCM sequence as a key step. Copyright