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Aromatic building blocks

alpha-Phenylcinnamic acid, (E)-

Also known as alpha-Phenylcinnamic acid, (E)-2,3-Diphenylacrylic Acid, 2,3-diphenylacrylic acid

CAS 91-48-5Formula C15H12O2Molar mass 224.26 g/molEC 202-069-4
GHS signal word: Warning. Pictograms: Harmful or irritant 4 suppliers listed
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alpha-Phenylcinnamic acid, (E)- chemical structure, C15H12O2, CAS 91-48-5
2D chemical structure

Key facts

What buyers check first

All properties
CAS number
91-48-5
Formula
C15H12O2
Molar mass
224.26 g/mol
EC number
202-069-4
HS code
291639
Category
Aromatic building blocks

What is alpha-Phenylcinnamic acid, (E)-?

Plain description, key identifiers and synonyms

alpha-Phenylcinnamic acid, (E)- is a chemical substance with the molecular formula C15H12O2 and a molar mass of 224.26 g/mol. Its CAS registry number is 91-48-5. The IUPAC name is (E)-2,3-diphenylprop-2-enoic acid.

Identifiers

Registry numbers, names and line notations, tap to copy

IUPAC name
(E)-2,3-diphenylprop-2-enoic acid
CAS number
91-48-5Other or deprecated CAS: 3368-16-9
EC numbers
202-069-4, 840-968-9
Molecular formula
C15H12O2
UNII
0PKH62904B
MDL number
MFCD00004252
InChIKey
BIDDLDNGQCUOJQ-SDNWHVSQSA-N
InChI
InChI=1S/C15H12O2/c16-15(17)14(13-9-5-2-6-10-13)11-12-7-3-1-4-8-12/h1-11H,(H,16,17)/b14-11+
Canonical SMILES
O=C(O)C(=Cc1ccccc1)c1ccccc1
Isomeric SMILES
C1=CC=C(C=C1)/C=C(\C2=CC=CC=C2)/C(=O)O

Synonyms

  • alpha-Phenylcinnamic acid
  • (E)-2,3-Diphenylacrylic Acid
  • 2,3-diphenylacrylic acid
  • 2,3-diphenylprop-2-enoic acid
  • (E)-2,3-Diphenylpropenoic acid
  • (e)-alpha-phenylcinnamic acid
  • trans-alpha-Phenylcinnamic Acid
  • trans-2,3-Diphenylacrylic acid
  • trans-2,3-Diphenylpropenoic acid
  • (E)-alpha-Stilbenecarboxylic acid
  • Benzeneacetic acid, alpha-(phenylmethylene)-
  • Acrylic acid, 2,3-diphenyl-, (E)-
  • (E)-2,3-Diphenyl-2-propenoic acid
  • Benzeneacetic acid, alpha-(phenylmethylene)-, (E)-
  • trans-2,3-Diphenyl-2-propenoic acid
  • Acrylic acid, 2,3-diphenyl-, trans-
  • alpha-phenylcinnamic acid trans-form
  • (2E)-2,3-diphenylacrylic acid
  • (2E)-2,3-diphenylprop-2-enoic acid
  • (E)-2,3-diphenylprop-2-enoic acid
  • alpha-Phenyl-trans-cinnamic acid
  • E-2,3-diphenylpropenoic acid
  • Atropic acid, beta-phenyl-
  • alpha-Stilbenecarboxylic acid
  • (E)-2,3-diphenyl-acrylic acid
Show all 29 synonyms
  • Acrylic acid,3-diphenyl-, (E)-
  • 2-Phenylcinnamic acid
  • alpha-Phenylcinnamate
  • 2,3-diphenyl-acrylic acid

Physical and chemical properties

Measured values and descriptors computed from the structure

Physical and chemical properties

Measured values, check the supplier specification for your grade

No measured properties are recorded for this substance yet. Ask suppliers for a technical data sheet.

Values vary by grade. Ask suppliers for the COA or TDS of the batch you buy.

Computed descriptors

Calculated from the structure, useful for screening and formulation

Molecular weight
224.26 g/molcalc.
Exact mass
224.0837 Dacalc.
LogP (octanol/water)
3.31calc.
Topological polar surface area
37.3 Ųcalc.
Hydrogen bond donors
1calc.
Hydrogen bond acceptors
1calc.
Rotatable bonds
3calc.
Heavy atoms
17calc.
Rings
2calc.
Aromatic rings
2calc.
Fraction sp3 carbons
0calc.
Formal charge
0calc.
Stereocentres
0calc.
Lipinski rule of five
Passes (0 violations)calc.

Calculated for screening. Confirm critical figures with the supplier.

Murcko scaffold

The ring system that remains when every side chain is removed

Murcko scaffold of this chemical, C(=Cc1ccccc1)c1ccccc1

C(=Cc1ccccc1)c1ccccc1

2 rings, 14 atoms, the Stilbene ring system.

2,005 other chemicals share this scaffold

Safety and hazards

GHS classification summary, not a safety data sheet

GHS signal word
Warning
GHS07: Harmful or irritant
Harmful or irritant

Hazard statements

  • H315Causes skin irritation.
  • H319Causes serious eye irritation.
  • H335May cause respiratory irritation.
Precautionary statements (16)
  • P261Avoid breathing dust, fume, gas, mist, vapours or spray.
  • P264Wash skin thoroughly after handling.
  • P264 + P265Wash skin thoroughly after handling. Do not touch eyes.
  • P271Use only outdoors or in a well-ventilated area.
  • P280Wear protective gloves, protective clothing, eye protection and face protection.
  • P302 + P352If on skin: Wash with plenty of water.
  • P304 + P340If inhaled: Remove person to fresh air and keep comfortable for breathing.
  • P305 + P351 + P338If in eyes: Rinse cautiously with water for several minutes. Remove contact lenses, if present and easy to do. Continue rinsing.
  • P319Get medical help if you feel unwell.
  • P321Specific treatment (see supplemental first aid instructions on the label).
  • P332 + P317If skin irritation occurs: Get medical help.
  • P337 + P317If eye irritation persists: Get medical help.
  • P362 + P364Take off contaminated clothing. And wash it before reuse.
  • P403 + P233Store in a well-ventilated place. Keep container tightly closed.
  • P405Store locked up.
  • P501Dispose of contents and container in accordance with local regulations.

GHS classification summary, not a safety data sheet (SDS). Classifications can differ by supplier, grade and concentration. Always check the supplier's SDS.

Full safety data and first aid

alpha-Phenylcinnamic acid, (E)- suppliers

Sponsored listings first, then the documented ranking: membership, verification, replies, completeness, freshness and ratings

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Where suppliers are based

4 suppliers in 3 countries

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alpha-Phenylcinnamic acid, (E)- price

Indicative price range per kg from live supplier offers

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Uses and applications

What the substance is used for, by industry and function

Regulatory status

Inventories, regulations and trade controls that list this substance

No regulatory list memberships are recorded for this substance yet. Always check the rules of the importing and exporting country before trade.

HS code and trade data

Customs classification and reported world trade statistics

Global trade

World import and export statistics for the HS code alpha-Phenylcinnamic acid, (E)- is traded under.

HS 2916.39Indicative HS code

Aromatic monocarboxylic acids, their anhydrides, halides, peroxides, peroxyacids and…

World exports in 2024
$706M
−6.8% vs 2023, imports $714M
2019 to 2024
Top exporters
  1. China49.0%
  2. India * partner reported16.2%
  3. Germany13.2%
Top importers
  1. India * partner reported14.5%
  2. United States12.2%
  3. Germany8.6%

* Partner reported figures, a lower bound.

Reported customs values in USD, not prices.Full trade data

The HS code shown for alpha-Phenylcinnamic acid, (E)- is indicative (it was assigned by structure rules). Confirm the classification with your customs broker before shipping.

Frequently asked questions

Quick answers about alpha-Phenylcinnamic acid, (E)-, based on the data on this page

What is alpha-Phenylcinnamic acid, (E)-?

alpha-Phenylcinnamic acid, (E)- is a chemical substance with the molecular formula C15H12O2 and a molar mass of 224.26 g/mol. Its CAS registry number is 91-48-5. The IUPAC name is (E)-2,3-diphenylprop-2-enoic acid.

What is the CAS number of alpha-Phenylcinnamic acid, (E)-?

The CAS registry number of alpha-Phenylcinnamic acid, (E)- is 91-48-5. Other or deprecated CAS numbers: 3368-16-9.

What is the molecular formula and weight of alpha-Phenylcinnamic acid, (E)-?

The molecular formula of alpha-Phenylcinnamic acid, (E)- is C15H12O2 and its molar mass is 224.26 g/mol.

What is alpha-Phenylcinnamic acid, (E)- used for?

Known uses and roles of alpha-Phenylcinnamic acid, (E)- include building blocks in research and laboratory and screening compounds in research and laboratory.

Is alpha-Phenylcinnamic acid, (E)- hazardous?

alpha-Phenylcinnamic acid, (E)- carries the GHS signal word "Warning". Main hazards: causes skin irritation, causes serious eye irritation, may cause respiratory irritation. This summary is not an SDS, always read the supplier safety data sheet.

What is the HS code of alpha-Phenylcinnamic acid, (E)-?

alpha-Phenylcinnamic acid, (E)- is usually classified under HS code 291639 (Aromatic monocarboxylic acids, their anhydrides, halides, peroxides, peroxyacids and…). This is indicative, confirm it with your customs broker before shipping.

Where can I buy alpha-Phenylcinnamic acid, (E)-?

CompoundList lists 4 suppliers of alpha-Phenylcinnamic acid, (E)- in United States, Armenia and Hong Kong. Send one free request to get and compare quotes. Your contact details stay private until you accept a quote.

What is the price of alpha-Phenylcinnamic acid, (E)-?

Suppliers quote alpha-Phenylcinnamic acid, (E)- on request because prices depend on grade, purity, quantity and destination. A free request on CompoundList gets you several quotes to compare.

Guides for buyers

Practical guides that help when you source, ship or handle alpha-Phenylcinnamic acid, (E)-

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Data last updated 7 Oct 2026. Details may have changed, please confirm them with the supplier. Report an error on this page
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