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4-Hydroxybenzoic acid CAS No.:99-96-7 supplier by Hangzhou Shitai Biotech
Apr 17, 2018

4-Hydroxybenzoic acid, also known as p-hydroxybenzoic acid (PHBA), is a monohydroxybenzoic acid, a phenolic derivative of benzoic acid. It is a white crystalline solid that is slightly soluble in water and chloroform but more soluble in polar organic solvents such as alcohols and acetone. 4-Hydroxybenzoic acid is primarily known as the basis for the preparation of its esters, known as parabens, which are used as preservatives in cosmetics and some ophthalmic solutions. It is isomeric with 2-hydroxybenzoic acid, known as salicylic acid, a precursor to aspirin.


PRODUCT   NAME

4-Hydroxybenzoic   acid

CAS   No.:

99-96-7

Synonyms

p-Salicylic acid;

Parahydroxy Benzoic Acid;

Formula:

C7H6O3

Molecular   Weight:

138.12100

PSA:

57.53000

LogP:

1.09040

 

Structure

      image.png           

 

Description

Appearance   & Physical State:

White   to beige crystalline powder

Density:

1.46   g/cm3

Melting   Point:

214-217ºC

Boiling   Point:

336.2ºC   at 760 mmHg

Flash   Point:

199ºC

Refractive   Index:

1.53

Water   Solubility:

5   g/L (20 ºC)

Stability:

Stable   under normal temperatures and pressures.

Storage   Condition:

Store   in a cool, dry place. Keep container closed when not in use.

RTECS:

DH1925000

Safety   Statements:

S26-S37/39

HS   Code:

2916399090

WGK   Germany:

1

Risk   Statements:

R36/37/38

Hazard   Codes:

Xi

 

Certificate of Analysis

 

ProductName: 4-Hydroxybenzoic acid

Cas:        99-96-7

Batch No.:     20110702

MFG Date:  July.02.2011

Analysis Date: July.02.2011

 

Inspect   Item

Quantity   Standard

Inspection   Result

Appearance  

White   crystalline powder

Conforms

Content   (as dry basis)

≥99.0   %

99.2%

Melting   point

213-216°C

Conforms

Smell

Tasteless

Conforms

Solubility

Clear   and transparent

Conforms

Loss   on drying

≤0.50%

Conforms

Chroma   (Pt - Co)

≤40

Conforms

Ash

≤0.15%

Conforms

Sulfate(SO42-)

≤0.05%

Conforms

Chloride(Cl-)

≤0.02%

Conforms

Phenol

≤0.10%

Conforms

Salicylic   acid

≤0.10%

Conforms

Conclusion  

In   accordance with enterprise standard


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