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Fumaric Acid (trans-Butenedioic Acid)

Fumaric
CAS 110-17-8 · Formula C4H4O4 · MW 116.07 g/mol

A long-shelf-life solid acidulant and a reactive diacid for unsaturated polyester systems. It is used as a food acidulant (for example in gelatin desserts and dry beverage powders), as a fortifier in unsaturated polyester, paper-size and alkyd coating resins, and as a chemical intermediate.

Part of Acids & Salts
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HS Code
2917.19
At a Glance
Material Family
Acids & Salts
Record Type
Pure compound
Primary Role
pH Adjustment · Synthesis Intermediate
Solubility
< 1 mg/mL at 22 °C
Functional Roles
pH Adjustment Synthesis Intermediate Crosslinking / Curing Preservation
INCI Name
FUMARIC ACID
CosIng Functions
BUFFERING
Industries Served
Beauty & Personal Care Food & Beverage Industrial Manufacturing
Applications & Use Cases
  • ▸ Food acidulant: acidity/tartness in dry beverages, desserts and baked goods
  • ▸ Unsaturated polyester resins: reactive diacid building block
  • ▸ Coatings and paper: fortifier in alkyd coating and paper-size resins
  • ▸ Chemical intermediate: feedstock for plasticizers such as dibutyl fumarate
Physical Properties
Melting Point
572 to 302 °C
Boiling Point
165 °C at 1.7 mmHg; sublimes
Density
1.635 at 20 °C
Solubility
< 1 mg/mL at 22 °C
Vapor Pressure
0.000154
Flash Point
273 °C (open cup)
pH
3,0-3,2 (0,05 % solution at 25 °C)
Safety & Handling
Full SDS available on request

A grade-specific Safety Data Sheet (SDS) — with the complete hazard classification, handling precautions, and transport information — is supplied with every shipment and available on request. Confirm all safety and regulatory details against the SDS for your specific grade.

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HS / Tariff Classification
Harmonized System (HS) Code — 6-digit international heading
2917 . 19
Chapter 29
Organic chemicals
Heading 29.17
Internationally harmonized (WCO HS)
Subheading 2917.19
6-digit international code — national tariff line adds further digits
Chemical Identity
CAS Number
110-17-8
Molecular Formula
C4H4O4
Molecular Weight
116.07 g/mol
IUPAC Name
(E)-but-2-enedioic acid
INCI Name
FUMARIC ACID
PubChem CID
444972
InChI Key
VZCYOOQTPOCHFL-OWOJBTEDSA-N
Synonyms & Trade Names
fumaric acid trans-Butenedioic acid Allomaleic acid Lichenic acid Boletic acid (2E)-but-2-enedioic acid Tumaric acid trans-1,2-Ethylenedicarboxylic acid (E)-2-Butenedioic acid Allomalenic acid trans-2-Butenedioic acid Fumaricum acidum 2-Butenedioic acid, (E)- Kyselina fumarova (2E)-2-butenedioic acid (E)-but-2-enedioic acid USAF EK-P-583 Butenedioic acid, (E)- FEMA No. 2488
Full Description

Fumaric acid (trans-butenedioic acid, CAS 110-17-8) is an unsaturated dicarboxylic acid supplied as a granular or powder acidulant. It is used as a food acidulant (for example in gelatin desserts and dry beverage powders), as a fortifier in unsaturated polyester, paper-size and alkyd coating resins, and as a chemical intermediate.

Frequently Asked Questions

What is fumaric acid used for?

Fumaric acid (trans-butenedioic acid, CAS 110-17-8) is used as a food acidulant in dry beverages, gelatin desserts, and baked goods, as a reactive diacid in unsaturated polyester resins, as a fortifier in alkyd coating and paper-size resins, and as a chemical intermediate (for example, to dibutyl fumarate).

Is fumaric acid an acid?

Yes. It is an unsaturated dicarboxylic acid (C4H4O4), the trans isomer of butenedioic acid; its cis isomer is maleic acid. It is supplied as a granular or powder acidulant.

What is the difference between fumaric acid and maleic acid?

They are geometric isomers of butenedioic acid: fumaric acid is the trans isomer and maleic acid is the cis isomer, giving them different melting points, solubility, and reactivity. Fumaric acid is the form used as a food acidulant and in unsaturated polyester resins.

What is the cost of bulk fumaric acid?

Pricing depends on grade (technical vs food) and packaging (bags, drums, or totes). Request a bulk quote with your volume and delivery point for current pricing.

What is the CAS number and HS code for fumaric acid?

Fumaric acid is CAS 110-17-8, classified under HS 2917.19. An SDS and Certificate of Analysis accompany each shipment.

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Disclaimer. Information on this page — including properties, identifiers, hazard, transport (DOT/UN) and tariff (HS) classifications, and applications — is provided for general reference and is compiled from authoritative public sources (e.g. PubChem/ECHA, 49 CFR 172.101, the Harmonized Tariff Schedule). Values are typical and are not a guaranteed specification; the Certificate of Analysis (CoA) for the lot purchased governs. Products are sold for industrial and professional use only. Nothing here is a medical, health, or efficacy claim or advice. Always consult the current Safety Data Sheet (SDS) before handling, storage, transport or disposal, and confirm regulatory status, classification and suitability for your application and jurisdiction. Hazard, transport and tariff classifications must be verified for your specific shipment. RawSource makes no warranty, express or implied, and assumes no liability for use of this information. Trademarks. Third-party trademarks and brand names are the property of their respective owners; any reference is nominative — used only to identify a comparable product — and does not imply affiliation with, sponsorship by, or endorsement by the trademark owner.
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