| 2-Methyl-2-pentenoic acid Basic information |
| Product Name: | 2-Methyl-2-pentenoic acid |
| Synonyms: | FEMA NUMBER 3195;2-Methyl-2-pentenoic acid,99%;2-METHYL-2-PENTENOIC ACID;RARECHEM AL BE 0127;2-methyl-2-pentenoicaci;2-methyl-pent-2-enoicacid;2-Pentene-2-carboxylicacid;3-Ethyl-2-methylacrylicacid |
| CAS: | 3142-72-1 |
| MF: | C6H10O2 |
| MW: | 114.14 |
| EINECS: | 221-552-0 |
| Product Categories: | Acids and Esters |
| Mol File: | 3142-72-1.mol |
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| 2-Methyl-2-pentenoic acid Chemical Properties |
| Melting point | 26-28 °C(lit.) |
| Boiling point | 123-125 °C30 mm Hg(lit.) |
| density | 0.979 g/mL at 25 °C |
| vapor density | >1 (vs air) |
| FEMA | 3195 | 2-METHYL-2-PENTENOIC ACID |
| refractive index | n20/D 1.46(lit.) |
| Fp | 226 °F |
| storage temp. | Sealed in dry,Room Temperature |
| pka | 5.00±0.19(Predicted) |
| form | powder to lump |
| color | White to Almost white |
| Odor | at 10.00 % in dipropylene glycol. dry acid sweaty strawberry woody fruity jam |
| Odor Type | acidic |
| FreezingPoint | 20.0 to 25.0 ℃ |
| JECFA Number | 1210 |
| InChIKey | JJYWRQLLQAKNAD-SNAWJCMRSA-N |
| LogP | 1.89 |
| CAS DataBase Reference | 3142-72-1(CAS DataBase Reference) |
| NIST Chemistry Reference | 2-Pentenoic acid, 2-methyl-(3142-72-1) |
| EPA Substance Registry System | 2-Pentenoic acid, 2-methyl- (3142-72-1) |
| Safety Information |
| Hazard Codes | C |
| Risk Statements | 34-22-41 |
| Safety Statements | 26-36/37/39-45 |
| RIDADR | UN 3261 8/PG 3 |
| WGK Germany | 2 |
| TSCA | Yes |
| HazardClass | 8 |
| PackingGroup | III |
| HS Code | 29161900 |
| Provider | Language |
|---|---|
| ACROS | English |
| SigmaAldrich | English |
| ALFA | English |
| 2-Methyl-2-pentenoic acid Usage And Synthesis |
| Description | May be prepared by distillation of 2-hydroxy-2-methylvaleric acid (m-form). |
| Chemical Properties | With a dry acid note, 2-Methyl-2-pentenoic Acid is found in the odor of strawberries.The acid can be prepared from the corresponding saturated one by α-bromination followed by dehydrobromination. It is used in fragrances to enhance fruity notes and in strawberry flavors. |
| Chemical Properties | white semi-transparent crystalline |
| Chemical Properties | 2-Methyl-2-pentenoic acid has a fruity odor. |
| Occurrence | Reported found in strawberry |
| Uses | 2-Methyl-2-pentenoic Acid (CAS# 3142-72-1) can be used for cleansing and refreshing hair and scalp. It can also be used to store and cure food products, and for providing a long-lasting strawberry odor. |
| Definition | ChEBI: 2-Methyl-2-pentenoic acid is a methyl-branched fatty acid. It is a conjugate acid of a 2-methyl-(2E)-pentenoate(1-). |
| Preparation | By distillation of 2-hydroxy-2-methylvaleric acid (cis-form). |
| Taste threshold values | Taste characteristics at 50 ppm: sour, acidic, sweaty, berry and fruit-like. |
| 2-Methyl-2-pentenoic acid Preparation Products And Raw materials |
| Raw materials | Propionaldehyde–>Silver nitrate |