3-methyl crotonic acid
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IUPAC name :3-methylbut-2-enoic acid
InChI :InChI=1/C5H8O2/c1-4(2)3-5(6)7/h3H,1-2H3,(H,6,7)
InChIKey :YYPNJNDODFVZLE-UHFFFAOYAX
SMILES :CC(=CC(=O)O)C
cas number :541-47-9
(EINECS) number :208-782-7
beilstein number :1720305
fema number :3187
coe number :10138
jecfa number :1204
fl. number :08.070
molar refractivity :26.67 ± 0.3 cm3
parachor :236.2 ± 4.0 cm3
index of refraction :1.450 ± 0.02
surface tension :32.2 ± 3.0 dyne/cm
density :1.010 ± 0.06 g/cm3
polarizability :10.57 ± 0.5 10-24cm3
XlogP : 0.80
molecular weight : 100.1158200
formula :C5 H8 O2
BioActivity Analysis :69178
NMR Predictor :Predict
 
 
export tariff code :unspecified
fda reg :unspecified

Suppliers :
Penta :3-methyl crotonic acid
Sigma-Aldrich-SAFC :3-Methylcrotonic acid
≥97%
Odor:  alcohol; green

organoleptics :
odor type :phenolic
odor strength :medium ,
recommend smelling in a 1.00 % solution or less
odor description :
at 1.00 % in propylene glycol.  
green phenolic dairy

properties :
appearence :white to tan crystals
assay : 97.00 to 100.00 %   
Food Chemicals Codex Listed :No
melting point : 66.00 to 70.00 °C. @ 760.00 mm Hg
boiling point : 195.00 to 197.00 °C. @ 760.00 mm Hg
boiling point : 114.00 °C. @ 40.00 mm Hg
flash point :> 212.00  °F.  TCC  ( > 100.00 °C. )
logP (o/w) : 1.40

safety :
most important hazard(s) :Xi - Irritant
  R 34 - Causes burns.
S 02 - Keep out of the reach of children.
S 22 - Do not breath dust.
S 26 - In case of contact with eyes, rinse immediately with plenty of water and seek medical advice.
S 27 - Take off immediately all contaminated clothing.
S 36/37/39 - Wear suitable clothing, gloves and eye/face protection.
Oral Toxicity(LD50) :
  Oral-Rat    3560.00  mg/kg

Oral-Guineapig    3000.00  mg/kg

Oral-Mouse    2580.00  mg/kg

Dermal Toxicity(LD50) :
  Skin-Rabbit  >3200.00  gm/kg

Inhalation Toxicity(LC50) :
  Not determined
 

safety in use :
 
recommendation for 3-methyl crotonic acid usage levels up to :
 not for fragrance use.

safety references :
EPI System :view
Canada Domestic Sub. List :Yes
EPA Chem. Sub. Inventory : Yes
 
WGK Germany :1
 
 
 
 3-methylbut-2-enoic acid
(EINECS) number :208-782-7
RTECS :GQ5425000 for 541-47-9
chemidplus :000541479
EPA Substance Registry Services :541-47-9

references :
 3-methylbut-2-enoic acid
fl. number :08.070
jecfa number :1204
NIST Chemistry WebBook :1921528580
pubchem :154231

other :
VCF-Online: VCF Volatile Compounds in Food
synonyms :
3,3-dimethyl acrylic acid
beta,beta-dimethyl acrylic acid
beta-methyl crotonic acid
3-methyl-2-butenoic acid
3-methylbut-2-enoic acid
 senecioic acid

soluble in :
 alcohol
 water

(odor and/or flavor) blends with :
 acetoin
 acetyl nonyryl
 butyl butyryl lactate
isobutyl methyl ketone
 butyric acid
 coconut decanone
 dairy lactone
delta-decalactone
 diphenyl oxide
2,5-dithiahexane
2-ethyl butyric acid
 heptanal 2,3-butane diol acetal
 methyl (Z)-5-octenoate
4-methyl octanoic acid
3-(methyl thio) methyl thiophene
S-(methyl thio) propionate
 nonanoic acid
delta-octalactone
gamma-octalactone
 phenyl pyruvic acid
 propionic acid
delta-tetradecalactone
2-tridecanone
 vanillic acid

(odor and/or flavor) used in :
 dairy
 green

natural occurrence in :
peucedanum japonicum



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