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Phenylacetic acid MOL WT. 136.15

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Phenylacetic acid CAS number [103-82-2]




















                                                                                                                  Chemicals  Phenylacetic acid
Phenylacetic acid

CAS number

IUPAC name

Phenylacetic acid

MOL WT. 136.15
H.S. CODE : 2916.33

Phenylacetic acid Molecular formula C8H8O2Identifiers

CAS number [103-82-2]
SMILES c1ccccc1CC(=O)O

PropertiesPhenylacetic acid

Molecular formula C8H8O2
Molar mass 136.15 g/mol
Density 1.0809 g/cm3
Melting point 76-77 C
Boiling point 265.5 C


MSDS External MSDS

Phenylacetic acid (abr. PAA and synonyms are: α-toluic acid, benzeneacetic acid, alpha tolylic acid, 2-phenylacetic acid) is an organic compound containing a phenyl functional group and an acetic acid functional group.

Because it is used in the illicit production of phenylacetone (used in the manufacture of meth/amphetamines), it is subject to controls in the United States.

Physical data

Appearance: white crystals with a honey-like odour
Melting point: 77 C
Boiling point: 265 C
Vapour density:
Vapour pressure: 1 mm Hg at 97 C
Density (g/cm3): 1.228
Flash point: 190
Explosion limits:
Autoignition temperature:
Phenylacetic acid ≥ 99%


Stable. Incompatible with strong oxidizing agents.


Harmful by ingestion, inhalation or through skin contact. Severe eye irritant. Skin and respiratory irritant. May act as a teratogen. Oral rat LD50 2250 mg/Kg

Toxicity data

(The meaning of any abbreviations which appear in this section is given here.)
ORL-RAT LD50 2250 mg kg-1
ORL-GPG LD50 2250 mg kg-1
IPN-RAT LD50 1600 mg kg-1

Risk phrases

(The meaning of any risk phrases which appear in this section is given here.)
R20 R21 R22 R36 R37 R38.

Personal protection

Safety glasses. Adequate ventilation.

NFPA RATINGS Health: 1 Flammability: 1 Reactivity: 0 FLASH POINT

190 C

STABILITY Stable under ordinary conditions


Phenylacetic acid is a white crystals with a disagreeable odor; boiling point 262 C; soluble in alcohol and ether. It serves as an ingredient in perfume to provide honey-like odor. It is found as a moiety in some alkaloids and plant hormones. It is formed as catabolite of phenylalanine. In toluic acid name system, phenylacetic acid is alpha-toluic acid which one of the hydrogen atoms in the methyl group has been substituted instead of the substitution in the benzene ring. Substituted phenylacetic acid molecule at alpha position and phenylacetate esters can serve as a drug with a wide variety of effects including anticholinergic, muscarinic antagonist, antidote to cholinesterase inhibitors or toxins, cycloplegic and mydriatic. Phenylacetic acid is used to prepare a nonsteroidal antiinflammatory drug like diclofenac. It is used the manufacture of penicillin. Mandelic Acid, phenylglycollic acid, can be produced from phenylchloracetic acid.

White to creamy flaky powder PURITY (GLC) 99.0% min
WATER 1.0% max
PACKING 25kgs in bag
UN NO.  

Hazard Symbols: XI, Risk Phrases: 36/37/38, Safety Phrases: 22/24/25


Note /Government Notification: These chemicals are designated as those that are used in the manufacture of the controlled substances and are important to the manufacture of the substances. For any (Control Substance) products Import and Export *** subjected to your country government laws /control substance ACT.
Information: The information on this web page is provided to help you to work safely, but it is intended to be an overview of hazards, not a replacement for a full Material Safety Data Sheet (MSDS). MSDS forms can be downloaded from the web sites of many chemical suppliers. ,also that the information on the PTCL Safety web site, where this page was hosted, has been copied onto many other sites, often without permission. If you have any doubts about the veracity of the information that you are viewing, or have any queries, please check the URL that your web browser displays for this page. If the URL begins " Benzoate.htm/" the page is maintained by the Safety Officer in Physical Chemistry at Oxford University. If not, this page is a copy made by some other person and we have no responsibility for it.
The Controlled Substances Act (CSA) was enacted into law by the Congress of the United States as Title II of the Comprehensive Drug Abuse Prevention and Control Act of 1970.[1] The CSA is the federal U.S. drug policy under which the manufacture, importation, possession, use and distribution of certain substances is regulated. The Act also served as the national implementing legislation for the Single Convention on Narcotic Drugs

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