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5471-51-2

Supplier Related Products Identification Chemical Properties Safety Data Raw materials And Preparation Products Material Safety Data Sheet(MSDS) Questions And Answer Well-known Reagent Company Product Information

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Identification

Name
4-(4-Hydroxyphenyl)-2-butanone
CAS
5471-51-2
Synonyms
4-(4-HYDROXYPHENYL)-2-BUTANONE
4-(4-HYDROXYPHENYL)BUTAN-2-ONE
4-HYDROXYBENZYLACETONE
4-(P-HYDROXYPHENYL)-2-BUTANONE
FEMA 2588
HYDROXYPHENYL-2-BUTANONE,4-
HYDROXY PHENYL BUTANONE
OXANONE
OXYPHENONE
OXYPHENYLON
P-HYDROXYBENZYLACETONE
P-HYDROXY PHENYL BUTANONE
RASBERRY KETONE
Raspberry keton
RASPBERRY KETONE
1-(p-Hydroxyphenyl)-3-butanone
2-Butanone, 4-(p-hydroxyphenyl)-
4-(4-hydroxyphenyl)-2-butanon
4-(p-hydroxyphenyl)-2-butanon
4-p-Hydroxylphenyl)-2-butone
EINECS(EC#)
226-806-4
Molecular Formula
C10H12O2
MDL Number
MFCD00002394
Molecular Weight
164.2
MOL File
5471-51-2.mol

Chemical Properties

Appearance
white to slightly yellow powder or needles
mp 
81-85 °C(lit.)

bp 
200°C
FEMA 
2588
Usage
Intermediates of Liquid Crystals
Detection Methods
HPLC,NMR
BRN 
776080
CAS DataBase Reference
5471-51-2(CAS DataBase Reference)
NIST Chemistry Reference
2-Butanone, 4-(4-hydroxyphenyl)-(5471-51-2)
EPA Substance Registry System
5471-51-2(EPA Substance)

Safety Data

Hazard Codes 
Xn,Xi
Risk Statements 
R22:Harmful if swallowed.
Safety Statements 
S26:In case of contact with eyes, rinse immediately with plenty of water and seek medical advice .
S36/37/39:Wear suitable protective clothing, gloves and eye/face protection .
WGK Germany 
2

RTECS 
EL8925000

Hazard Note 
Irritant
HS Code 
29145000
Safety Profile
Poison by intraperitoneal route. Moderately toxic by ingestion. Flammable liquid. When heated to decomposition it emits acrid smoke and irritating fumes. See also KETONES.

Raw materials And Preparation Products

Material Safety Data Sheet(MSDS)

msds information
Frambinone(5471-51-2).msds

Questions And Answer

Chemical properties
It appears as white needle crystal or granular solid, exhibiting raspberry aroma and fruit aroma. The melting point temperature is 82~83 °C. It is insoluble in water and oil, being soluble in alcohol, ether and volatile oil.
The natural products exist in raspberry (raspberry) and so on.
Uses
1. Raspberry Ketone is used in the preparation of food spices with sweetening effect, can also be used for cosmetics and soap flavor.
2. Raspberry Ketone is widely used in strawberry, raspberry, pineapple, peaches and other food flavors, usually used as a fixing agent in the fruity flavor. In daily flavor, it can be used in formulations such as jasmine, gardenia flowers and tuberose. As a modifier, it can be used in jasmine, gardenia, tuberose and other fragrant daily flavor. In food flavors, it is mostly used for strawberries, pineapple, peaches, plums, mayberry and other fragrance. In medicine, it is mostly used as intermediates.
Production method
3.5mol 15% sodium hydroxide is first added to the reactor, and 2 mol of acetone and 1mol of p-hydroxybenzaldehyde are added dropwise under stirring. The temperature is controlled between 20 and 30 DEG C, and the stirring reaction is continued for 20 hours. The solid sodium salt of 4-p-hydroxyphenylbutene-3-ketone-2 was obtained after filtering, further dissolved in water, and then acidified with hydrochloric acid to precipitate 4-p-hydroxyphenylbutene-3-ketone-2, further filter and dry for further application.
The autoclave was supplied with 100 g of the intermediate and 5 g of the nickel catalyst, and the atmosphere was replaced with hydrogen. The mixture was heated to 120-140 °C and reacted at a pressure of 0.98 MPa for 1.5 h. After cooling, the catalyst was filtered off, the raspberry ketone content was 89% and the hydrogenation yield was 92%. The crude product above is subject to vacuum distillation once with further recrystallization of 1-2 times getting white crystals with the melting point of 82 ° C.
Phenol route
94g phenol and 85% phosphoric acid mixed catalyst were added into the reactor, 70g methyl vinyl ketone was added dropwise in 40min, the temperature was maintained at 15-20 ℃, and the reaction was stirred for 4h. After completion of the reaction, the reaction mixture was washed with water until neutral, and 63 g of phenol was distilled off under reduced pressure to obtain 25 g of a product having a melting point of 81.5 to 82.5 ° C and a yield of 80%.
It is obtained through the condensation between hydroxybenzaldehyde and acetone and further hydrogenation.
It is obtained through the condensation between the ketone acid and phenol.

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