Melting point :70-72 °C(lit.)
Boiling point :180-181 °C(lit.)
Density :1.027 g/mL at 25 °C(lit.)
vapor density :2.97 (vs air)
vapor pressure :0.19 mm Hg ( 20 °C)
refractive index :1.4210 (estimate)
FEMA :3908 | (E)-2-BUTENOIC ACID
Flash point :190 °F
storage temp. :2-8°C
pka :4.80±0.10(Predicted)
Odor :at 0.10 % in propylene glycol. roasted burnt
Odor Type :milky
Water Solubility :soluble
Henry's Law Constant :2.3×10¹ mol/(m³Pa) at 25℃, Duchowicz et al. (2020)
Cosmetics Ingredients Functions :FRAGRANCE
LIGHT STABILIZER LogP :0.720
CAS DataBase Reference :3724-65-0(CAS DataBase Reference)
NIST Chemistry Reference :Crotonic acid(3724-65-0)
EPA Substance Registry System :Crotonic acid (3724-65-0)

Symbol(GHS):
Signal word:	Danger
Hazard statements:	Code Hazard statements Hazard class Category Signal word Pictogram P-Codes H302 Harmful if swallowed Acute toxicity,oral Category 4 Warning P264, P270, P301+P312, P330, P501 H312 Harmful in contact with skin Acute toxicity,dermal Category 4 Warning P280,P302+P352, P312, P322, P363,P501 H314 Causes severe skin burns and eye damage Skin corrosion/irritation Category 1A, B, C Danger P260,P264, P280, P301+P330+ P331,P303+P361+P353, P363, P304+P340,P310, P321, P305+ P351+P338, P405,P501
Precautionary statements:	P260 Do not breathe dust/fume/gas/mist/vapours/spray. P264 Wash hands thoroughly after handling. P264 Wash skin thouroughly after handling. P270 Do not eat, drink or smoke when using this product. P280 Wear protective gloves/protective clothing/eye protection/face protection. P301+P312 IF SWALLOWED: call a POISON CENTER or doctor/physician IF you feel unwell. P301+P330+P331 IF SWALLOWED: Rinse mouth. Do NOT induce vomiting. P302+P352 IF ON SKIN: wash with plenty of soap and water. P303+P361+P353 IF ON SKIN (or hair): Remove/Take off Immediately all contaminated clothing. Rinse SKIN with water/shower. P304+P340 IF INHALED: Remove victim to fresh air and Keep at rest in a position comfortable for breathing. P305+P351+P338 IF IN EYES: Rinse cautiously with water for several minutes. Remove contact lenses, if present and easy to do. Continuerinsing. P310 Immediately call a POISON CENTER or doctor/physician. P312 Call a POISON CENTER or doctor/physician if you feel unwell. P330 Rinse mouth. P363 Wash contaminated clothing before reuse. P405 Store locked up. P501 Dispose of contents/container to..…