Substance profile
Isobutyl Methacrylate
Isobutyl Methacrylate is a liquid.
01 · Identification
What Isobutyl Methacrylate is
Isobutyl Methacrylate is a liquid. Its molecular formula is C8H14O2 and its molecular weight is 142.2 g/mol. It boils at 155 °C, melts at -61 °C, is miscible with water.
Under the GHS it carries the signal word Warning. It is classed as flammable agents - 2nd degree.
02 · Identifiers
Isobutyl Methacrylate identifiers and molecular data
Isobutyl Methacrylate CAS number and EC number
Isobutyl Methacrylate molecular formula and molecular weight
03 · GHS classification
Isobutyl Methacrylate hazard classification
Harmonised classification under CLP Annex VI. This is the legally binding classification in the EU; other jurisdictions may differ.
Isobutyl Methacrylate pictograms and signal word
Isobutyl Methacrylate hazard class and category
| Hazard class | Category | From code | Pictogram |
|---|---|---|---|
| Flammable liquids GHS chapter 2.6 | Category 3 | H226 | GHS02 |
| Skin corrosion/irritation GHS chapter 3.2 | Category 2 | H315 | GHS07 |
| Skin sensitisation GHS chapter 3.4 | Category 1 or 1A or 1B | H317 | GHS07 |
| Specific target organ toxicity - single exposure GHS chapter 3.8 | Category 3 | H335 | GHS07 |
Where two values are shown with “or”, the hazard statement is shared by more than one category or by more than one class, and the code alone does not say which. H272, for example, belongs to oxidising liquids and to oxidising solids — the physical state decides. The binding answer for a specific entry is in the CLP Annex VI table itself.
Isobutyl Methacrylate hazard statements (H-codes)
| Code | Hazard statement |
|---|---|
| H226 | Flammable liquid and vapour. |
| H335 | May cause respiratory irritation. |
| H315 | Causes skin irritation. |
| H317 | May cause an allergic skin reaction. |
This page lists only the codes assigned to Isobutyl Methacrylate. 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 Isobutyl Methacrylate
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 Isobutyl Methacrylate 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
Isobutyl Methacrylate precautionary statements
CLP Annex VI assigns 14 precautionary statements to Isobutyl Methacrylate. 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.
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
Isobutyl Methacrylate 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 | изобутилов метакрилат |
| Spanish español | Metacrilato de isobutilo |
| Czech čeština | isobutyl-methakrylát |
| Danish dansk | isobutylmethacrylat |
| German Deutsch | Isobutylmethacrylat |
| Estonian eesti | isobutüülmetakrülaat |
| Greek ελληνικά | μεθακρυλικός ισοβουτυλεστέρας μεθακρυλικό ισοβουτύλιο |
| English English | isobutyl methacrylate |
| French français | méthacrylate d'isobutyle |
| Croatian hrvatski | izobutil-metakrilat |
| Italian italiano | metacrilato di isobutile |
| Latvian latviešu | izobutilmetakrilāts |
| Lithuanian lietuvių | izobutilmetakrilatas |
| Hungarian magyar | izobutil-metakrilát |
| Maltese Malti | metakrilat tal-isobutil |
| Dutch Nederlands | isobutylmethacrylaat |
| Polish polski | metakrylan izobutylu |
| Portuguese português | metacrilato de isobutilo |
| Romanian română | metacrilat de izobutil |
| Slovak slovenčina | izobutyl-metakrylát |
| Slovenian slovenščina | izobutil metakrilat |
| Finnish suomi | isobutyylimetakrylaatti |
| Swedish svenska | isobutylmetakrylat |
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
Isobutyl Methacrylate GHS label elements
Everything CLP Annex VI fixes for Isobutyl Methacrylate, laid out the way it appears on a label. The greyed lines are the parts only the supplier can fill in.
Warning
Isobutyl Methacrylate
- Flammable liquid and vapour.
- May cause respiratory irritation.
- Causes skin irritation.
- May cause an allergic skin reaction.
- Keep away from heat, hot surfaces, sparks, open flames and other ignition sources. No smoking.
- Keep container tightly closed.
- Use explosion-proof [electrical/ventilating/lighting/…] equipment.
- Use only non-sparking tools.
- Avoid breathing dust/fume/gas/mist/vapours/spray.
- Wash … thoroughly after handling.
- Contaminated work clothing should not be allowed out of the workplace.
- Wear protective gloves/protective clothing/eye protection/face protection/hearing protection/…
- IF ON SKIN:
- Get medical advice/attention.
- If skin irritation occurs:
- If skin irritation or rash occurs:
- Wash with plenty of water/…
- Store in a well-ventilated place.
Supplier name, address and telephone number· Product identifier·Nominal quantity
Need this as an actual label? Open Isobutyl Methacrylate in the GHS label constructor →
07 · Health hazards
Isobutyl Methacrylate health hazards and exposure limits
Isobutyl Methacrylate hazard summary
A lachrymator; [CHEMINFO] A skin, eye, and respiratory tract irritant; [HSDB] A skin, eye, and respiratory tract irritant; May cause skin sensitization; [eChemPortal: ESIS]; An irritant; Potential skin sensitizer; [MSDSonline] Isobutyl methacrylate, stabilized (UN2283) has warning of explosive polymerization; [ERG 2016]
Source: Haz-Map, Information on Hazardous Chemicals and Occupational Diseases
08 · Physical and chemical properties
Isobutyl Methacrylate 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.
Isobutyl Methacrylate boiling point
| Property | Value | Conditions | Source |
|---|---|---|---|
| Boiling point | 155 °C (311 °F) | HSDB | |
| 155 °C (311 °F) | at 760 mmHg | CAMEO |
Isobutyl Methacrylate melting point
| Property | Value | Conditions | Source |
|---|---|---|---|
| Melting point | -61 °C (-77.8 °F) | HSDB |
Isobutyl Methacrylate density
| Property | Value | Conditions | Source |
|---|---|---|---|
| Density | 0.8858 g/cm³ | at 20 °C | HSDB |
| 0.882 g/cm³ | at 25 °C | HSDB |
Isobutyl Methacrylate solubility
| Property | Value | Conditions | Source |
|---|---|---|---|
| Solubility | Miscible with ethanol, ethyl ether | HSDB | |
| Insoluble in water | HSDB | ||
| In water, 1300 mg/L at 25 °C | at 25 °C | HSDB |
Isobutyl Methacrylate vapor pressure
| Property | Value | Conditions | Source |
|---|---|---|---|
| Vapor pressure | 3.63 mmHg | at 25 °C | HSDB |
| 3.63 mmHg | Haz-Map |
Isobutyl Methacrylate flash point
| Property | Value | Conditions | Source |
|---|---|---|---|
| Flash point | 35 °C (95 °F) | closed cup | HSDB |
| 49 °C (120.2 °F) | Tag open cup | HSDB | |
| 48.89 °C (120 °F) | CAMEO |
Isobutyl Methacrylate autoignition temperature
| Property | Value | Conditions | Source |
|---|---|---|---|
| Autoignition temperature | 390 °C (734 °F) | HSDB |
Isobutyl Methacrylate lower explosive limit (LEL)
| Property | Value | Conditions | Source |
|---|---|---|---|
| Lower explosive limit (LEL) | 1 % by volume | HSDB |
Isobutyl Methacrylate upper explosive limit (UEL)
| Property | Value | Conditions | Source |
|---|---|---|---|
| Upper explosive limit (UEL) | 7.4 % by volume | HSDB |
Isobutyl Methacrylate odor threshold
| Property | Value | Conditions | Source |
|---|---|---|---|
| Odor threshold | 0.016 - 0.069 ppm | HSDB |
Values compiled from PubChem Laboratory Chemical Safety Summary. Temperatures converted to Fahrenheit for reference.
09 · Fire and explosion
Isobutyl Methacrylate 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.
Isobutyl Methacrylate fire potential
Flammable when exposed to heat or flame.
Source: Hazardous Substances Data Bank (HSDB)
10 · Handling and storage
Isobutyl Methacrylate storage and handling
Isobutyl Methacrylate storage conditions
Temp during storage must be kept low to minimize formation of peroxides and other oxidation products. ... Storage temp below 30 °C are recommended for i-Butylmethacrylate. The methacrylate monomer should not be stored for longer than one year. Isobutyl methacrylate is sensitive to UV light and should, therefore, be stored in the dark. The methacrylic ester may be stored in mild steel, stainless steel, or aluminum.
Source: Hazardous Substances Data Bank (HSDB)
Isobutyl Methacrylate reactivity
ISOBUTYL METHACRYLATE is an acrlate ester. Esters react with acids to liberate heat along with alcohols and acids. Strong oxidizing acids may cause a vigorous reaction that is sufficiently exothermic to ignite the reaction products. Heat is also generated by the interaction of esters with caustic solutions. Flammable hydrogen is generated by mixing esters with alkali metals and hydrides. This compound polymerizes readily. (NTP, 1992)
Source: CAMEO Chemicals
Planning storage for a mix of chemicals? Check Isobutyl Methacrylate in the storage compatibility matrix →
11 · Transport
Isobutyl Methacrylate UN number and transport classification
Transport classification is a separate system from the GHS classification above. It decides how a package is marked and how a load may be carried; it does not follow from the workplace label, and the workplace label does not follow from it. The entries below are linked by CAS number, never by name.
Isobutyl Methacrylate under UN 2283 — shipping name, class and packing group
Europe · ADR 2025, Table A
| Proper shipping name (3.1.2) | Class | Classification code | PG | Labels (column 5) |
|---|---|---|---|---|
| ISOBUTYL METHACRYLATE, STABILIZED | 3 | F1 | III | |
Source: ADR 2025, Table A of Chapter 3.2 · ECE/TRANS/352 Vol. I (UNECE). Class 3 is “Flammable liquids” (ADR 2.1.1.1).
United States · 49 CFR 172.101 Hazardous Materials Table
| Proper shipping name (column 2) | Class or division | PG | Labels (column 6) |
|---|---|---|---|
| Isobutyl methacrylate, stabilized | 3 | III | |
Source: 49 CFR 172.101 Hazardous Materials Table · eCFR, revision 2026-08-03. Class 3 is “Flammable and combustible liquid” (49 CFR 173.2).
12 · Questions
Isobutyl Methacrylate — frequently asked questions
What is the CAS number of Isobutyl Methacrylate?
The CAS number of Isobutyl Methacrylate is 97-86-9. Its EC number is 202-613-0.
What is the chemical formula of Isobutyl Methacrylate?
The molecular formula of Isobutyl Methacrylate is C8H14O2 and its molecular weight is 142.2 g/mol.
What does a Isobutyl Methacrylate label have to show?
Under CLP Annex VI the label for Isobutyl Methacrylate carries the pictograms Flame and Exclamation mark and the signal word is Warning.
Is Isobutyl Methacrylate flammable?
Yes. CLP Annex VI assigns Isobutyl Methacrylate H226 — flammable liquid and vapour. The flash point reported for it is 35 °C (95 °F), closed cup (HSDB).
Is Isobutyl Methacrylate a carcinogen?
CLP Annex VI records no harmonised carcinogenicity classification for Isobutyl Methacrylate. 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.
What is the boiling point of Isobutyl Methacrylate?
The boiling point reported for Isobutyl Methacrylate is 155 °C (311 °F) (HSDB).
What is the melting point of Isobutyl Methacrylate?
The melting point reported for Isobutyl Methacrylate is -61 °C (-77.8 °F) (HSDB).
How should Isobutyl Methacrylate be stored?
CLP Annex VI assigns Isobutyl Methacrylate the storage statement P403. Temp during storage must be kept low to minimize formation of peroxides and other oxidation products. ... Storage temp below 30 °C are recommended for i-Butylmethacrylate. The methacrylate monomer should not be stored for longer than one year. Isobutyl methacrylate is sensitive to UV light and should, therefore, be stored in the dark. The methacrylic ester may be stored in mild steel, stainless steel, or aluminum. (Hazardous Substances Data Bank (HSDB))
Nearby
Substances next to Isobutyl Methacrylate
Keep going: substances starting with I, or search the whole database by name, CAS number, pictogram or signal word.