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Home > Encyclopedia > 3-Methyl-2-buten-1-ol

3-Methyl-2-buten-1-ol

3-Methyl-2-buten-1-ol structure

3-Methyl-2-buten-1-ol 

structure
  • CAS No:

    556-82-1

  • Formula:

    C5H10O

  • Chemical Name:

    3-Methyl-2-buten-1-ol

  • Synonyms:

    2-Buten-1-ol,3-methyl-;3-Methyl-2-buten-1-ol;Prenol;γ,γ-Dimethylallyl alcohol;3-Methyl-2-butene-1-ol;3-Methyl-2-butenyl alcohol;3,3-Dimethylallyl alcohol;Prenyl alcohol;3-Methyl-2-butenol;Dimethylallyl alcohol;3-Methylcrotyl alcohol;2-Methyl-2-buten-4-ol;NSC 158709;Isopent-2-en-1-ol;Isopentenol;135146-66-6

  • Categories:

    Cosmetic Ingredient  >  Perfuming

Description

3-Methyl-2-buten-1-ol has a phenolic, metallic odor bearing a resemblance to iron gallate ink clear colourless to very slightly yellow liquid


Liquid|COLOURLESS LIQUID WITH CHARACTERISTIC ODOUR.|Liquid; fresh, fruity, green, slight lavender aroma


Prenol is an alkenyl alcohol and a member of prenols.

3-Methyl-2-buten-1-ol Basic Attributes

86.13

86.13

1633479

209-141-4

55MY0HM445

1760

158709

1987

DTXSID2027206

29052990

Characteristics

20.2

0.91

Clear colorless to very slightly yellow Liquid

0.8689 g/cm3 @ Temp: 21 °C

59-60 °C

140 °C

110 °F

1.442-1.444

H2O: 170 g/L (20 ºC)

Flammables area

1.4 mm Hg ( 20 °C)

Relative vapour density (air = 1): 3.0

2.7-16.3%(V)

305 °C

The vapour is heavier than air.

Safety Information

III

3

UN 1987 3/PG 3

1

10-22-36/37/38-38-21/22

26-36-37-23-16

EM9472500

Xn

Fireproof. Keep in a well-ventilated room. Well closed. Store in an area without drain or sewer access.

Stable under normal temperatures and pressures.

P261-P305 + P351 + P338

H226-H302-H315-H319-H335

Flammable. Above 50 °C explosive vapour/air mixtures may be formed.

|Danger|H226 (100%): Flammable liquid and vapor [Warning Flammable liquids]|P210, P233, P240, P241, P242, P243, P260, P264, P270, P280, P301+P312, P301+P330+P331, P302+P352, P303+P361+P353, P304+P340, P305+P351+P338, P310, P321, P330, P332+P313, P337+P313, P362, P363, P370+P378, P403+P235, P405, and P501|Aggregated GHS information provided by 1771 companies from 16 notifications to the ECHA C&L Inventory. Each notification may be associated with multiple companies.|H226: Flammable liquid and vapor [Warning Flammable liquids]|P210, P233, P240, P241, P242, P243, P260, P264, P270, P280, P301+P312, P301+P330+P331, P303+P361+P353, P304+P340, P305+P351+P338, P309+P311, P310, P321, P330, P337+P313, P363, P370+P378, P403+P235, P405, and P501

Use foam, carbon dioxide, dry powder, water in large amounts. In case of fire: keep drums, etc., cool by spraying with water.

Explosive limits , vol% in air: 2.7-16.3

Personal protection: protective gloves and safety goggles. Do NOT let this chemical enter the environment. Collect leaking liquid in sealable containers. Carefully collect remainder. Then store and dispose of according to local regulations. Cover the spilled material with non-combustible.

Fireproof. Keep in a well-ventilated room. Well closed. Store in an area without drain or sewer access.

No indication can be given about the rate at which a harmful concentration of this substance in the air is reached on evaporation at 20 °C.

The substance is severely irritating to the skin and eyes.

NO open flames, NO sparks and NO smoking. Above 50 °C use a closed system, ventilation and explosion-proof electrical equipment.

PREVENT GENERATION OF MISTS!

Use ventilation, local exhaust or breathing protection.

Protective gloves. Protective clothing.

Wear face shield or eye protection in combination with breathing protection.

Drug Information

Fresh air, rest. Seek medical attention if you feel unwell.


First rinse with plenty of water for at least 15 minutes, then remove contaminated clothes and rinse again. Refer for medical attention .


First rinse with plenty of water for several minutes (remove contact lenses if easily possible), then refer for medical attention.

3-methyl-2-buten-1-ol

The substance can be absorbed into the body by ingestion and by inhalation of its vapour.

Sore throat. Cough.


Redness. Pain.


Redness. Pain.

3-Methyl-2-buten-1-ol Use and Manufacturing

Methods of Manufacturing

The product can be obtained by reacting isobutylene with formaldehyde. Add 95% polyformaldehyde to a stainless steel autoclave, use disodium hydrogen phosphate as a catalyst, add tert-butanol, replace the air in the reactor with nitrogen, then add isobutylene, heat to 200°C with stirring for 4 hours, and then cool The output is distilled to obtain 3-methyl-2-butenol with a yield of 85%. It is also possible to use isoprene as a raw material to react with hydrogen chloride to obtain 1-chloro-3-methylbutene-2 by transposition. The latter is placed in a reactor and an aqueous solution of sodium acetate is added, stirred, and the reaction temperature is controlled at 100~110 ℃, react for 3~4h, layer to obtain prenol acetate, add 30% sodium hydroxide solution to prenol acetate, heat to reflux for 3h, layer, distill the organic layer, collect 52~58 The ℃/2.7×103Pa distillate is prenol, and the yield is 80%.

Uses

Used in organic synthesis.

2-Buten-1-ol, 3-methyl-: ACTIVE

Food additives -> Flavoring Agents|Flavoring Agents -> JECFA Flavorings Index|Fatty Acyls [FA] -> Fatty alcohols [FA05]

Flavoring Agents

Computed Properties

Molecular Weight:86.13
XLogP3:1
Hydrogen Bond Donor Count:1
Hydrogen Bond Acceptor Count:1
Rotatable Bond Count:1
Exact Mass:86.073164938
Monoisotopic Mass:86.073164938
Topological Polar Surface Area:20.2
Heavy Atom Count:6
Complexity:51
Covalently-Bonded Unit Count:1
Compound Is Canonicalized:Yes

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