Substance profile
2-Methylstyrene
2-Methylstyrene is a liquid.
01 · Identification
What 2-Methylstyrene is
2-Methylstyrene is a liquid. Its molecular formula is C9H10 and its molecular weight is 118.18 g/mol. It boils at 170 °C, melts at -68.5 °C, is practically insoluble in water.
Under the GHS it carries the signal word Warning. It is classed as flammable agents - 2nd degree.
02 · Identifiers
2-Methylstyrene identifiers and molecular data
2-Methylstyrene CAS number and EC number
2-Methylstyrene molecular formula and molecular weight
Other names for 2-Methylstyrene
- 2-vinyltoluene
03 · GHS classification
2-Methylstyrene hazard classification
Harmonised classification under CLP Annex VI. This is the legally binding classification in the EU; other jurisdictions may differ.
2-Methylstyrene pictograms and signal word
2-Methylstyrene hazard class and category
| Hazard class | Category | From code | Pictogram |
|---|---|---|---|
| Acute toxicity - inhalation GHS chapter 3.1 | Category 4 | H332 | GHS07 |
| Hazardous to the aquatic environment - chronic GHS chapter 4.1 | Category 2 | H411 | GHS09 |
2-Methylstyrene hazard statements (H-codes)
| Code | Hazard statement |
|---|---|
| H332 | Harmful if inhaled. |
| H411 | Toxic to aquatic life with long lasting effects. |
This page lists only the codes assigned to 2-Methylstyrene. The full reference lives on the hazard statements hub, the precautionary statements hub and the GHS pictograms hub.
Safety Data Sheet
Getting an SDS for 2-Methylstyrene
A Safety Data Sheet is written for a product, not for a substance: the supplier of the grade you actually buy issues it, so two suppliers of 2-Methylstyrene issue two different sheets. That is why there is no single authoritative SDS for a substance to download — what there is, is the job of collecting the sheets for the products you hold and keeping them current as suppliers revise them.
04 · Precautionary statements
2-Methylstyrene precautionary statements
CLP Annex VI assigns 7 precautionary statements to 2-Methylstyrene. They are grouped the way a label groups them: what to do before handling, what to do when something has already happened, how to store it and how to dispose of it.
Prevention
What to do before and during handling so the hazard never happens.
Response
What to do once exposure, spillage or fire has already happened.
Disposal
What has to happen to the contents and the empty container.
Reading the notation. … is a blank the supplier fills in — not a truncated sentence.· [square brackets] mark a part printed only when it applies.
05 · Names in the regulation
2-Methylstyrene name in 23 EU languages
CLP Annex VI Part 3 is published in every language edition of the regulation, and the identification column is written out in each of them. Nothing below is translated by us: each line is the name as that edition prints it. Under Art. 18(2) the substance name from Annex VI is a lawful product identifier, so this is the wording to put on a label going to that market — and where the cell lists several designations, any one of them qualifies.
| Language | Name in CLP Annex VI Part 3 |
|---|---|
| Bulgarian български | 2-метилстирен 2-винилтолуен |
| Spanish español | 2-Metilestireno 2-viniltolueno |
| Czech čeština | 2-methylstyren |
| Danish dansk | 2-methylstyren 2-vinyltoluen |
| German Deutsch | 2-Methylstyrol 2-Vinyltoluol |
| Estonian eesti | 2-metüülstüreen 2-vinüültolueen |
| Greek ελληνικά | 2-μεθυλοστυρόλιο 2-βινυλοτολουόλιο |
| English English | 2-methylstyrene 2-vinyltoluene |
| French français | 2-méthylstyrène 2-vinyltoluène |
| Croatian hrvatski | 2-metilstiren 2-viniltoluen |
| Italian italiano | 2- metilstirene 2-viniltoluene |
| Latvian latviešu | 2-metilstirols 2-viniltoluols |
| Lithuanian lietuvių | 2-metilstirenas 2-viniltoluenas |
| Hungarian magyar | 2-metilsztirol 2-viniltoluol |
| Maltese Malti | 2-metilstiren 2-viniltoluwen |
| Dutch Nederlands | 2-methylstyreen 2-vinyltolueen |
| Polish polski | 2-metylostyren 2-winylotoluen |
| Portuguese português | 2-metilestireno 2-viniltolueno |
| Romanian română | 2-metilstiren 2-viniltoluen |
| Slovak slovenčina | 2-metylstyrén 2-vinyltoluén |
| Slovenian slovenščina | 2-metilstiren 2-viniltoluen |
| Finnish suomi | 2-metyylistyreeni 2-vinyylitolueeni |
| Swedish svenska | 2-metylstyren 2-vinyltoluen |
All 23 language editions of Annex VI carry this entry. Irish is the twenty-fourth official EU language and has no line here for a different reason: no consolidated CLP text has ever been published in Irish, so there is no Irish edition of Annex VI to quote a name from. Source: consolidated CLP, CELEX 02008R1272, language editions. © European Union, https://eur-lex.europa.eu — only the electronic Official Journal of the European Union is authentic.
06 · Label elements
2-Methylstyrene GHS label elements
Everything CLP Annex VI fixes for 2-Methylstyrene, laid out the way it appears on a label. The greyed lines are the parts only the supplier can fill in.
Warning
2-Methylstyrene
- Harmful if inhaled.
- Toxic to aquatic life with long lasting effects.
- Do not breathe dust/fume/gas/mist/vapours/spray.
- Use only outdoors or in a well-ventilated area.
- Avoid release to the environment.
- IF INHALED:
- Call a POISON CENTER/doctor/… if you feel unwell.
- Collect spillage.
- Dispose of contents/container to …
Supplier name, address and telephone number· Product identifier·Nominal quantity
Need this as an actual label? Open 2-Methylstyrene in the GHS label constructor →
07 · Health hazards
2-Methylstyrene health hazards and exposure limits
2-Methylstyrene hazard summary
Vinyl toluene is similar to styrene in its toxicological properties. Fatty degeneration of the liver occurs in acute animal studies. Human subjects found the odor detectable at 50 ppm and objectionable at 300 ppm. [ACGIH] Mainly an eye and respiratory tract irritant, it can cause central nervous system depression after absorption of high doses. [NIOSH Guidelines for Chemical Hazards] A skin, eye, and respiratory tract irritant; Inhalation of high concentrations may cause CNS effects; May cause liver injury; [ICSC] Vinyltoluenes, stabilized (UN2618) has warning of explosive polymerization; [ERG 2016]
Source: Haz-Map, Information on Hazardous Chemicals and Occupational Diseases
2-Methylstyrene carcinogenicity classification
Under the conditions of these 2-year inhalation studies, there was no evidence of carcinogenic activity for male or female F344/N rats exposed to 100 or 300 ppm vinyl toluene and no evidence of carcinogenic activity for male or female B6C3F1 mice exposed to 10 or 25 ppm.
Source: US National Toxicology Program · TR-375: Toxicology and Carcinogenesis Studies of Vinyl Toluene (Mixed Isomers) (65%-71% meta-isomer and 32%-35% para-isomer) (CASRN 25013-15-4) in F344/N Rats and B6C3F1 Mice (Inhalation Studies) (1990 )
An IARC group and a CLP classification answer different questions. IARC judges whether the evidence for cancer in humans is strong enough; CLP Annex VI is the legally binding EU classification. A substance can carry one and not the other.
2-Methylstyrene occupational exposure limits
| Limit | Value | Source |
|---|---|---|
| PEL | 100.0 [ppm] | Haz-Map, Information on Hazardous Chemicals and Occupational Diseases |
| PEL | 100 ppm (480 mg/m³) | Occupational Safety and Health Administration (OSHA) |
| PEL | TWA 100 ppm (480 mg/m3) | The National Institute for Occupational Safety and Health (NIOSH) |
| REL | 100 ppm (480 mg/m³) | Occupational Safety and Health Administration (OSHA) |
| REL | TWA 100 ppm (480 mg/m3) | The National Institute for Occupational Safety and Health (NIOSH) |
| IDLH | 400.0 [ppm] | Haz-Map, Information on Hazardous Chemicals and Occupational Diseases |
| IDLH | 400 ppm. /Vinyl toluene/ | Hazardous Substances Data Bank (HSDB) |
| IDLH | 400 ppm | Occupational Safety and Health Administration (OSHA) |
These are United States values. The European Union sets its own indicative and binding limits, and the figure that applies at a given workplace is the one in the local regulation — not the one shown here.
08 · Physical and chemical properties
2-Methylstyrene properties
Every value is shown with the conditions it was measured under and the source it came from. Where sources disagree, all values are listed rather than one being picked — the difference is usually a different form of the substance, not an error.
2-Methylstyrene boiling point
| Property | Value | Conditions | Source |
|---|---|---|---|
| Boiling point | 170 °C (338 °F) | HSDB | |
| 170.56 °C (339 °F) | NIOSH |
2-Methylstyrene melting point
| Property | Value | Conditions | Source |
|---|---|---|---|
| Melting point | -68.5 °C (-91.3 °F) | HSDB | |
| -76.67 °C (-106 °F) | NIOSH | ||
| -69 °C (-92.2 °F) | ICSC |
2-Methylstyrene density
| Property | Value | Conditions | Source |
|---|---|---|---|
| Density | 0.89 g/cm³ | NIOSH | |
| 0.91 g/cm³ | ICSC | ||
| 0.9077 g/cm³ | at 25 °C | HSDB |
2-Methylstyrene solubility
| Property | Value | Conditions | Source |
|---|---|---|---|
| Solubility | Insoluble in water | HSDB | |
| Soluble in benzene, chloroform | HSDB | ||
| 0.009% | NIOSH |
2-Methylstyrene vapor pressure
| Property | Value | Conditions | Source |
|---|---|---|---|
| Vapor pressure | 1 mmHg | NIOSH | |
| 1.85 mmHg | at 25 °C | HSDB | |
| 1.8001 mmHg | at 25 °C | ICSC |
2-Methylstyrene flash point
| Property | Value | Conditions | Source |
|---|---|---|---|
| Flash point | 58 °C (136.4 °F) | HSDB | |
| 60 °C (140 °F) | HSDB | ||
| 52.78 °C (127 °F) | NIOSH |
2-Methylstyrene autoignition temperature
| Property | Value | Conditions | Source |
|---|---|---|---|
| Autoignition temperature | 494 °C (921.2 °F) | HSDB |
2-Methylstyrene lower explosive limit (LEL)
| Property | Value | Conditions | Source |
|---|---|---|---|
| Lower explosive limit (LEL) | 1.9 % by volume | HSDB | |
| 0.8 % by volume | NIOSH |
2-Methylstyrene upper explosive limit (UEL)
| Property | Value | Conditions | Source |
|---|---|---|---|
| Upper explosive limit (UEL) | 6.1 % by volume | HSDB | |
| 11 % by volume | NIOSH |
2-Methylstyrene vapor density
| Property | Value | Conditions | Source |
|---|---|---|---|
| Vapor density | 4.1 (air = 1) | ICSC | |
| 4.08 (air = 1) | OSHA |
2-Methylstyrene odor threshold
| Property | Value | Conditions | Source |
|---|---|---|---|
| Odor threshold | Odor Threshold Low: 10.0 [ppm] | Haz-Map | |
| Odor threshold from "Quick Guide: The Electronic NIOSH Pocket Guide to Chemical Hazards" | Haz-Map |
Values compiled from PubChem Laboratory Chemical Safety Summary. Temperatures converted to Fahrenheit for reference.
09 · Fire and explosion
2-Methylstyrene fire and explosion behaviour
These are descriptions rather than measured values, so they are kept out of the table above and quoted here with the source that reported them.
2-Methylstyrene fire potential
Flammable.
Source: Hazardous Substances Data Bank (HSDB)
10 · Handling and storage
2-Methylstyrene storage and handling
2-Methylstyrene safe storage
Fireproof. Separated from strong oxidants and strong acids. Well closed. Store only if stabilized. Provision to contain effluent from fire extinguishing. Store in an area without drain or sewer access.
Source: ILO-WHO International Chemical Safety Cards (ICSCs)
2-Methylstyrene storage conditions
Keep container tightly closed in a dry and well-ventilated place. Containers which are opened must be carefully resealed and kept upright to prevent leakage. Recommended storage temperature: 2-8 °C
Source: Hazardous Substances Data Bank (HSDB)
2-Methylstyrene incompatible materials
Incompatible materials: Strong oxidizing agents, strong acids.
Source: Hazardous Substances Data Bank (HSDB)
Planning storage for a mix of chemicals? Check 2-Methylstyrene in the storage compatibility matrix →
11 · Questions
2-Methylstyrene — frequently asked questions
What is the CAS number of 2-Methylstyrene?
The CAS number of 2-Methylstyrene is 611-15-4. Its EC number is 210-256-7.
What is the chemical formula of 2-Methylstyrene?
The molecular formula of 2-Methylstyrene is C9H10 and its molecular weight is 118.18 g/mol.
What does a 2-Methylstyrene label have to show?
Under CLP Annex VI the label for 2-Methylstyrene carries the pictograms Exclamation mark and Environment and the signal word is Warning.
Is 2-Methylstyrene flammable?
CLP Annex VI assigns 2-Methylstyrene no flammability hazard class. That is not a statement that it cannot burn: the harmonised list only records the hazards that were assessed for it. The flash point reported for it is 58 °C (136.4 °F) (HSDB).
Is 2-Methylstyrene a carcinogen?
CLP Annex VI records no harmonised carcinogenicity classification for 2-Methylstyrene. Annex VI is a list of agreed classifications, not a list of substances found safe, so this is an absence of a classification rather than a clean bill of health. IARC places it in Group 3: not classifiable as to its carcinogenicity to humans.
What is the exposure limit for 2-Methylstyrene?
The US occupational exposure limit reported for 2-Methylstyrene is 100.0 [ppm] (Haz-Map, Information on Hazardous Chemicals and Occupational Diseases). Limits differ by country: the EU sets its own indicative and binding values, and the figure that applies at a given workplace is the one in the local regulation.
What is the boiling point of 2-Methylstyrene?
The boiling point reported for 2-Methylstyrene is 170 °C (338 °F) (HSDB).
What is the melting point of 2-Methylstyrene?
The melting point reported for 2-Methylstyrene is -68.5 °C (-91.3 °F) (HSDB).
How should 2-Methylstyrene be stored?
Keep container tightly closed in a dry and well-ventilated place. Containers which are opened must be carefully resealed and kept upright to prevent leakage. Recommended storage temperature: 2-8 °C (Hazardous Substances Data Bank (HSDB))
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