trans-Crotonic acid

CAS: 107-93-7

Overview

Trans-Crotonic acid (CAS 107-93-7 ), also known by its FEMA 3908 designation, is an unsaturated organic acid used as a flavoring agent and acidulant in food and cosmetic applications.

It functions as a pH regulator, preservative component, and reactive monomer in polymer synthesis for coating and adhesive systems. In food and beverage formulations, it contributes flavor modulation and mild acidulant activity.

The material is recognized under its FEMA code for use in approved flavoring compositions. Cosmetic and personal care formulators incorporate it into film-forming polymers and fixative resins for hair care products.

In these applications, it provides controlled hold and flexibility. In industrial coating systems, it acts as a copolymerizable monomer to modify resin hardness, adhesion, and film durability for various surfaces.

Its buffering capacity also makes it relevant in preservation systems where pH control supports antimicrobial efficacy. Trans-Crotonic acid is supplied as a white to off-white crystalline solid for industrial use.

Standard commercial grades include food-grade material meeting FEMA specifications and technical-grade product for polymer applications. Packaging is typically offered in kilogram quantities for specialty use and larger bulk formats.

Physical Properties

Melting Point	72 °C
Boiling Point	185 °C
Density	1.027 g/mL at 25 °C(lit.)
Flash Point	190 °F
Appearance	White to light yellow crystalline flakes
Color	White to light yellow
Odor	at 1.00 %. milky
Form	Crystalline Flakes
Water Solubility	94 g/L (25 ºC)
Vapor Pressure	0.19 mm Hg ( 20 °C)
Refractive Index	1.4228
pH	3 (10g/l, H2O, 20℃)
Log P	0.85 at 25℃

Safety & Handling

Danger GHS05 GHS07 GHS06 Hazard Statements H302 Harmful if swallowed H311 Toxic in contact with skin H312 Harmful in contact with skin H314 Causes severe skin burns and eye damage H315 Causes skin irritation H318 Causes serious eye damage H319 Causes serious eye irritation H335 May cause respiratory irritation Precautionary Statements P260 Do not breathe dust/fume/gas/mist/vapours/spray. P261 Avoid breathing dust/fume/gas/mist/vapours/spray. P262 Do not get in eyes, on skin, or on clothing. P264 Wash … thoroughly after handling. P270 Do not eat, drink or smoke when using this product. P271 Use only outdoors or in a well-ventilated area. P280 Wear protective gloves/protective clothing/eye protection/face protection. P316 Get emergency medical help immediately. P317 Get emergency medical help. P319 Get medical advice/attention if you feel unwell. P321 Specific treatment (see … on this label). P330 Rinse mouth. P363 Wash contaminated clothing before reuse. P405 Store locked up. P501 Dispose of contents/container in accordance with local regulations. P264+P265 Wash … thoroughly after handling. P301+P317 Get emergency medical help. P302+P352 IF ON SKIN: Wash with plenty of water. P304+P340 IF INHALED: Remove person to fresh air and keep comfortable for breathing. P332+P317 Get emergency medical help. P337+P317 If eye irritation persists: Get medical advice/attention. Get emergency medical help. P361+P364 Take off immediately all contaminated clothing and wash it before reuse. P362+P364 Take off contaminated clothing and wash it before reuse. P403+P233 Store in a well-ventilated place. Keep container tightly closed. P301+P330+P331 Rinse mouth. Do NOT induce vomiting. P302+P361+P354 IF ON SKIN: Take off immediately all contaminated clothing. Rinse skin with water/shower. P305+P351+P338 IF IN EYES: Rinse cautiously with water for several minutes. Remove contact lenses, if present and easy to do. Continue rinsing. P305+P354+P338 IF IN EYES: Rinse cautiously with water for several minutes. Remove contact lenses, if present and easy to do. Continue rinsing.

Trade & Regulatory

HS Code	29161940
UN Number	2823
ADR Class	8
Packing Group	III
Storage Class	8A - Combustible corrosive hazardous materials
WGK (Germany)	3

Other Names

Industries

Personal Care & Cosmetics Food & Nutrition