反式巴豆酸

Description

Trans-crotonic acid · CAS 107-93-7 · C4H6O2. UNII YW5WZZ4O5Q. Boiling Point: 184.7; Boiling Point: 185 °C; Boiling Point: 185.00 °C. @ 760.00 mm Hg.

Identification

CAS Registry Number	107-93-7
PubChem CID	637090
Molecular formula	C4H6O2
IUPAC name	(E)-but-2-enoic acid
UNII (FDA)	YW5WZZ4O5Q
FEMA number	3908
JECFA number	1371

Computed Descriptors

Molecular Weight	86.09
XLogP3	0.7
Hydrogen Bond Donor Count	1
Hydrogen Bond Acceptor Count	2
Rotatable Bond Count	1
Exact Mass	86.036779430
Monoisotopic Mass	86.036779430
Topological Polar Surface Area	37.3
Heavy Atom Count	6
Formal Charge	0

Physical & Chemical Properties

Boiling Point	184.7
Boiling Point	185 °C
Boiling Point	185.00 °C. @ 760.00 mm Hg
Boiling Point	189 °C
Boiling Point	185 °C @760 [mm Hg]
Melting Point	72
Melting Point	72 °C
Flash Point	190 °F (NFPA, 2010)
Flash Point	88 °C o.c.
Solubility	94000

Physical description & handling notes

• Crotonic acid appears as a white crystalline solid. Shipped as either a solid or liquid. Soluble in water and less dense than water. Corrosive to metals and tissue.
• Dry Powder
• White to yellow solid; [ICSC] Cream colored crystals; [MSDSonline]
• Solid
• WHITE-TO-YELLOW CRYSTALS WITH PUNGENT ODOUR.
• Off-white powder; Harsh, pungent, acrylic odour

Regulatory Status

Regulatory & Food Contact	EU Flavoring substances FDA Substance added to food: FLAVORING AGENT OR ADJUVANT FDA Cumulative Estimated Daily Intake (CEDI): FCS FDA Inventory of Food Contact Substances Listed in 21 CFR: FCS Flavoring Agents FLAVOURING_AGENT: Flavouring Agent
GHS notification summary	0.3% (5 / 1826)

GHS Hazard Classification

GHS notification summary	0.3% (5 / 1826)
Reported hazard statements	H302 (95.3%), H312 (90.4%), H314 (91.7%), H318 (87.3%), H311, H315, H319

Documented Uses

• Used to make copolymers (for lacquers, paper sizing, resins, plasticizers, and drugs) and softening agents for synthetic rubber; Also used as a coating, fungicide, and corrosion-resistant additive; [HSDB]
• Painting (Pigments, Binders, and Biocides) [Category: Paint]
• MFR OF COPOLYMERS WITH VINYL ACETATE USED IN LACQUERS & PAPER SIZING; MFR OF SOFTENING AGENTS FOR SYNTHETIC RUBBER; IN MEDICINAL CHEMISTRY, EG, MFR OF DL-THREONINE, VIT A
• Coating, resins, fungicide, corrosion resistance improvement additive. Water-soluble resins and copolymers are suitable for pharmaceuticals, binders, and film
• Chemical modifications rendering the surface layers of silicone rubber contact lenses hydrophilic property.
• Carboxylated comonomer (polyvinyl acetate latex).

Synonyms

CROTONIC ACID; (E)-but-2-enoic acid; trans-2-Butenoic acid; 3-Methylacrylic acid; (2E)-but-2-enoic acid; 3724-65-0; beta-Methylacrylic acid; alpha-Butenoic acid; alpha-Crotonic acid; Solid crotonic acid; beta-Methacrylic acid; Kyselina krotonova; Acrylic acid, 3-methyl-; 2E-butenoic acid; YW5WZZ4O5Q; NSC-8751

Frequently Asked Questions

What are the CAS number and molecular formula of Trans-crotonic acid?

CAS 107-93-7; molecular formula C4H6O2; molecular weight — g/mol.

What other names is Trans-crotonic acid known by?

CROTONIC ACID, (E)-but-2-enoic acid, trans-2-Butenoic acid, 3-Methylacrylic acid, (2E)-but-2-enoic acid, 3724-65-0.

What is the regulatory status of Trans-crotonic acid?

Documented regulatory listings: EU Flavoring substances; FDA Substance added to food: FLAVORING AGENT OR ADJUVANT; FDA Cumulative Estimated Daily Intake (CEDI): FCS.

Is Trans-crotonic acid classified as hazardous?

0.3% of GHS notifications report no hazard classification (5 of 1826).

What are the key physical properties of Trans-crotonic acid?

Boiling Point: 184.7; Boiling Point: 185 °C; Boiling Point: 185.00 °C. @ 760.00 mm Hg; Boiling Point: 189 °C.

Facts on this page are taken from PubChem (US National Library of Medicine) and Wikidata. Grade-specific data — assay, moisture, particle size, packaging, shelf life — is issued per batch on the COA and is not published here.