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Aromatics

trans-beta-METHYLSTYRENE

Also known as (E)-1-Phenylpropene, benzene, (1E)-1-propenyl-, trans-Propenyl benzene

CAS 873-66-5Formula C9H10Molar mass 118.18 g/molEC 211-287-9
GHS signal word: Danger. Pictograms: Flammable, Corrosive, Harmful or irritant, Serious health hazard 5 suppliers listed
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trans-beta-METHYLSTYRENE chemical structure, C9H10, CAS 873-66-5
2D chemical structure

Key facts

What buyers check first

All properties
Physical form
Liquid
Melting point
-29 °C
Boiling point
175 °C
Density
Relative density (water = 1): 0.911
Flash point
52 °C
HS code
290290
Category
Aromatics
UN number
UN 2618
Illustrative photo, 200 litre steel drums of liquid in a chemical plant
Typical packagingIllustrative packaging image, not the actual product

What is trans-beta-METHYLSTYRENE?

Plain description, key identifiers and synonyms

Isoallylbenzene is a member of styrenes.

Identifiers

Registry numbers, names and line notations, tap to copy

IUPAC name
[(E)-prop-1-enyl]benzene
CAS number
873-66-5 CAS number cross-checkedOther or deprecated CAS: 637-50-3
EC numbers
211-287-9, 212-848-0
Molecular formula
C9H10
UNII
9367GUB59O, A5S9N1785O
MDL number
MFCD00009280
InChIKey
QROGIFZRVHSFLM-QHHAFSJGSA-N
InChI
InChI=1S/C9H10/c1-2-6-9-7-4-3-5-8-9/h2-8H,1H3/b6-2+
Canonical SMILES
CC=Cc1ccccc1
Isomeric SMILES
C/C=C/C1=CC=CC=C1

Synonyms

  • (E)-1-Phenylpropene
  • benzene, (1E)-1-propenyl-
  • trans-Propenyl benzene
  • Styrene, beta-methyl-, (E)-
  • beta-Methylstyrene, trans-
  • 1-Phenylpropene
  • trans-1-Phenyl-1-propene
  • Prop-1-en-1-ylbenzene
  • [(E)-prop-1-enyl]benzene
  • 1-Phenyl-1-propene
  • trans-Propenylbenzene
  • trans-1-Propenylbenzene
  • 1-Propene, 1-phenyl-
  • Propenylbenzene-trans
  • trans-1-Phenylpropene
  • (E)-Prop-1-en-1-ylbenzene
  • trans-phenylpropene
  • beta-Methylstyrene
  • trans-|A-Methylstyrene
  • (Z)-beta-Methylstyrene
  • Benzene, 1-propenyl-, (E)-
  • beta-Methylstyrol
  • omega-Methylstyrene
  • 1-Propen-1-ylbenzene
  • [(E)-prop-1-enyl]-benzene
Show all 37 synonyms
  • (1E)-prop-1-en-1-ylbenzene
  • (E)-1-Propenylbenzene
  • (E)-beta-Methylstyrene
  • doi:10.14272/QROGIFZRVHSFLM-QHHAFSJGSA-N.1
  • trans-b-Methylstyrene (Stabilized with 3,5-di-tert-butylcatechol)
  • Benzene, propenyl-, (E)-
  • (prop-1-en-1-yl)benzene
  • (E)-1-Phenyl-1-propene
  • Benzene, propenyl- (VAN)
  • a-methylstyrol
  • ss-methylstyrene
  • benzene-trans-propenyl

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

Physical form
Liquidexp.
Melting point
-29 °Cexp.
Boiling point
175 °Cexp.
Density
Relative density (water = 1): 0.911exp.
Flash point
52 °Cexp.
Solubility
Solubility in water, g/100ml at 25 °C: 0.014 (very poor)exp.
Vapour pressure
Vapor pressure, kPa at 25 °C: 0.15exp.

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
118.18 g/molcalc.
Exact mass
118.0783 Dacalc.
LogP (octanol/water)
2.72calc.
Topological polar surface area
0 Ųcalc.
Hydrogen bond donors
0calc.
Hydrogen bond acceptors
0calc.
Rotatable bonds
1calc.
Heavy atoms
9calc.
Rings
1calc.
Aromatic rings
1calc.
Fraction sp3 carbons
0.11calc.
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
Danger
GHS02: Flammable
Flammable
GHS05: Corrosive
Corrosive
GHS07: Harmful or irritant
Harmful or irritant
GHS08: Serious health hazard
Serious health hazard

Hazard statements

  • H226Flammable liquid and vapour.
  • H304May be fatal if swallowed and enters airways.
  • H315Causes skin irritation.
  • H318Causes serious eye damage.
  • H334May cause allergy or asthma symptoms or breathing difficulties if inhaled.
  • H335May cause respiratory irritation.
Precautionary statements (31)
  • P210Keep away from heat, hot surfaces, sparks, open flames and other ignition sources. No smoking.
  • P233Keep container tightly closed.
  • P240Ground and bond container and receiving equipment.
  • P241Use explosion-proof electrical, ventilating and lighting equipment.
  • P242Use non-sparking tools.
  • P243Take action to prevent static discharges.
  • P260Do not breathe dust, fume, gas, mist, vapours or spray.
  • 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.
  • P284In case of inadequate ventilation wear respiratory protection.
  • P301 + P316If swallowed: Get emergency medical help immediately.
  • P302 + P352If on skin: Wash with plenty of water.
  • P303 + P361 + P353If on skin (or hair): Take off immediately all contaminated clothing. Rinse skin with water or shower.
  • P304 + P340If inhaled: Remove person to fresh air and keep comfortable for breathing.
  • P305 + P354 + P338If in eyes: Immediately rinse with water for several minutes. Remove contact lenses, if present and easy to do. Continue rinsing.
  • P317Get medical help.
  • P319Get medical help if you feel unwell.
  • P321Specific treatment (see supplemental first aid instructions on the label).
  • P331Do not induce vomiting.
  • P332 + P317If skin irritation occurs: Get medical help.
  • P342 + P316If experiencing respiratory symptoms: Get emergency medical help immediately.
  • P362 + P364Take off contaminated clothing. And wash it before reuse.
  • P370 + P378In case of fire: Use appropriate media to extinguish.
  • P403Store in a well-ventilated place.
  • P403 + P233Store in a well-ventilated place. Keep container tightly closed.
  • P403 + P235Store in a well-ventilated place. Keep cool.
  • P405Store locked up.
  • P501Dispose of contents and container in accordance with local regulations.
UN number
UN 2618
Transport hazard class
3
Packing group
III

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

trans-beta-METHYLSTYRENE suppliers

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Where suppliers are based

5 suppliers in 5 countries

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trans-beta-METHYLSTYRENE 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

Applications are not documented for this substance yet. Suppliers often describe uses on their product pages, linked in the suppliers list above.

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 trans-beta-METHYLSTYRENE is traded under.

HS 2902.90Indicative HS code

Cyclic hydrocarbons, other

World exports in 2024
$612M
−6.1% vs 2023, imports $670M
2019 to 2024
Top exporters
  1. China28.0%
  2. Germany13.9%
  3. India * partner reported12.6%
Top importers
  1. Germany11.1%
  2. United States10.6%
  3. South Korea8.3%

* Partner reported figures, a lower bound.

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

The HS code shown for trans-beta-METHYLSTYRENE is indicative (it was assigned by structure rules). Confirm the classification with your customs broker before shipping.

Frequently asked questions

Quick answers about trans-beta-METHYLSTYRENE, based on the data on this page

What is trans-beta-METHYLSTYRENE?

Isoallylbenzene is a member of styrenes.

What is the CAS number of trans-beta-METHYLSTYRENE?

The CAS registry number of trans-beta-METHYLSTYRENE is 873-66-5. Other or deprecated CAS numbers: 637-50-3.

What is the molecular formula and weight of trans-beta-METHYLSTYRENE?

The molecular formula of trans-beta-METHYLSTYRENE is C9H10 and its molar mass is 118.18 g/mol.

Is trans-beta-METHYLSTYRENE hazardous?

trans-beta-METHYLSTYRENE carries the GHS signal word "Danger". Main hazards: flammable liquid and vapour, may be fatal if swallowed and enters airways, causes skin irritation. This summary is not an SDS, always read the supplier safety data sheet.

What is the HS code of trans-beta-METHYLSTYRENE?

trans-beta-METHYLSTYRENE is usually classified under HS code 290290 (Cyclic hydrocarbons, other). This is indicative, confirm it with your customs broker before shipping.

Where can I buy trans-beta-METHYLSTYRENE?

CompoundList lists 5 suppliers of trans-beta-METHYLSTYRENE in Bulgaria, Canada, China, Singapore and 1 more. Send one free request to get and compare quotes. Your contact details stay private until you accept a quote.

What is the price of trans-beta-METHYLSTYRENE?

Suppliers quote trans-beta-METHYLSTYRENE 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 trans-beta-METHYLSTYRENE

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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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