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Synthetic aroma chemicals

Cinnamic acid

Also known as 3-Phenylacrylic acid, Phenylacrylic acid, Zimtsaeure

CAS 621-82-9Formula C9H8O2Molar mass 148.16 g/molEC 205-398-1
GHS signal word: Warning. Pictograms: Harmful or irritant 153 suppliers listed Drug substance
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Cinnamic acid chemical structure, C9H8O2, CAS 621-82-9
2D chemical structure

Key facts

What buyers check first

All properties
CAS number
621-82-9
Formula
C9H8O2
Molar mass
148.16 g/mol
EC number
205-398-1
HS code
291639
Category
Synthetic aroma chemicals

What is Cinnamic acid?

Plain description, key identifiers and synonyms

Cinnamic acid is a monocarboxylic acid that consists of acrylic acid bearing a phenyl substituent at the 3-position. It is found in Cinnamomum cassia. It has a role as a plant metabolite. It is a member of cinnamic acids and a member of styrenes. It is a conjugate acid of a cinnamate.

Identifiers

Registry numbers, names and line notations, tap to copy

IUPAC name
(E)-3-phenylprop-2-enoic acid
CAS number
621-82-9 CAS number cross-checkedOther or deprecated CAS: 140-10-3
EC numbers
205-398-1, 210-708-3
Molecular formula
C9H8O2
UNII
U14A832J8D
MDL number
MFCD00004369
INCI name
CINNAMIC ACID
InChIKey
WBYWAXJHAXSJNI-VOTSOKGWSA-N
InChI
InChI=1S/C9H8O2/c10-9(11)7-6-8-4-2-1-3-5-8/h1-7H,(H,10,11)/b7-6+
Canonical SMILES
O=C(O)C=Cc1ccccc1
Isomeric SMILES
C1=CC=C(C=C1)/C=C/C(=O)O

Synonyms

  • 3-Phenylacrylic acid
  • Phenylacrylic acid
  • Zimtsaeure
  • (E)-3-phenylprop-2-enoic acid
  • 3-Phenylpropenoic acid
  • 3-phenylprop-2-enoic acid
  • Cinnamic acid, (E)-
  • Cinnamylic acid
  • Benzenepropenoic acid
  • beta-Phenylacrylic acid
  • Benzylideneacetic acid
  • Cinnamic acidum
  • Cinnamic acid, trans-
  • Kyselina skoricove
  • Acidum cinnamylicum
  • Cinnamic Acid 1511
  • cinnamic acid, (trans)-(E)-
  • cinnamic acid, 13C-labeled cpd
  • cinnamic acid, 14C-labeled cpd
  • cinnamic acid, 3H-labeled cpd (E)-
  • cinnamic acid, 3H-labeled cpd (Z)-
  • cinnamic acid, 14C-labeled cpd (E)-
  • Cinnamic acid (constituent of cinnamomum verum bark)
  • trans-Cinnamic acid (constituent of cinnamomum cassia bark)
  • trans-Cinnamic acid
Show all 38 synonyms
  • (E)-Cinnamic acid
  • trans-3-Phenylacrylic acid
  • (2E)-3-phenylprop-2-enoic acid
  • E-Cinnamic Acid
  • 2-Propenoic acid, 3-phenyl-, (2E)-
  • (2E)-3-Phenyl-2-propenoic acid
  • trans-beta-Carboxystyrene
  • t-Cinnamic acid
  • Benzeneacrylic acid
  • (E)-3-Phenyl-2-propenoic acid
  • trans-3-Phenyl-2-propenoic acid
  • 2-Propenoic acid, 3-phenyl-, (E)-
  • (2E)-2-Phenyl-2-propenoic 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
148.16 g/molcalc.
Exact mass
148.0524 Dacalc.
LogP (octanol/water)
1.78calc.
Topological polar surface area
37.3 ร…ยฒcalc.
Hydrogen bond donors
1calc.
Hydrogen bond acceptors
1calc.
Rotatable bonds
2calc.
Heavy atoms
11calc.
Rings
1calc.
Aromatic rings
1calc.
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, c1ccccc1

c1ccccc1

1 ring, 6 atoms, the Benzene ring system.

485,677 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

Cinnamic acid suppliers

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All 153 suppliers
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Suppliers marked Unclaimed profile have not claimed their profile yet. They are not verified by CompoundList, their offers are price on request and details may have changed, so please confirm them with the supplier. Company representatives can claim a profile with a business email on the company's own website domain. Our team verifies each claim and sends the result by email.

Where suppliers are based

153 suppliers in 18 countries

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Cinnamic acid price

Indicative price range per kg from live supplier offers

No published prices right now

Suppliers quote this chemical on request. Send one free request and compare quotes side by side.

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Uses and applications

What the substance is used for, by industry and function

Cosmetic ingredient, INCI name CINNAMIC ACID(skin conditioning, perfuming)

Roles

  • eukaryotic metabolite
  • metabolite
  • plant metabolite

Functional uses

  • Flavouring and nutrient
  • Fragrance
  • Softener and conditioner

Cosmetic functions

  • Perfuming
  • Skin conditioning

Regulatory status

Inventories, regulations and trade controls that list this substance

Health and food

  • EU cosmetic ingredient inventory
  • Active ingredient in FDA approved drug labels

United States

  • TSCA inventory (USA)
    Status: Active in US commerce

HS code and trade data

Customs classification and reported world trade statistics

Global trade

World import and export statistics for the HS code Cinnamic acid is traded under.

HS 2916.39Indicative HS code

Aromatic monocarboxylic acids, their anhydrides, halides, peroxides, peroxyacids andโ€ฆ

World exports in 2024
$706M
โˆ’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 Cinnamic acid is indicative (it was assigned by structure rules). Confirm the classification with your customs broker before shipping.

Frequently asked questions

Quick answers about Cinnamic acid, based on the data on this page

What is Cinnamic acid?

Cinnamic acid is a monocarboxylic acid that consists of acrylic acid bearing a phenyl substituent at the 3-position. It is found in Cinnamomum cassia. It has a role as a plant metabolite. It is a member of cinnamic acids and a member of styrenes. It is a conjugate acid of a cinnamate.

What is the CAS number of Cinnamic acid?

The CAS registry number of Cinnamic acid is 621-82-9. Other or deprecated CAS numbers: 140-10-3.

What is the molecular formula and weight of Cinnamic acid?

The molecular formula of Cinnamic acid is C9H8O2 and its molar mass is 148.16 g/mol.

What is Cinnamic acid used for?

Known uses and roles of Cinnamic acid include skin conditioning agents in cosmetics and personal care, fragrance ingredients in cosmetics and personal care, fragrance ingredients in flavors and fragrances, eukaryotic metabolite, metabolite and 6 more.

Is Cinnamic acid hazardous?

Cinnamic acid 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 Cinnamic acid?

Cinnamic acid is usually classified under HS code 291639 (Aromatic monocarboxylic acids, their anhydrides, halides, peroxides, peroxyacids andโ€ฆ). This is indicative, confirm it with your customs broker before shipping.

Where can I buy Cinnamic acid?

CompoundList lists 153 suppliers of Cinnamic acid in China, United States, India, Germany and 14 more. Send one free request to get and compare quotes. Your contact details stay private until you accept a quote.

Where can I buy Cinnamic acid in India?

16 suppliers in India list Cinnamic acid on CompoundList. Filter the suppliers list by country and send a request to compare prices, grades and delivery times.

What is the price of Cinnamic acid?

Suppliers quote Cinnamic acid 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 Cinnamic acid

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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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