Substance profile
Butyl Methacrylate
Butyl Methacrylate is a colorless liquid with faint characteristic odor of esters.
01 · Identification
What Butyl Methacrylate is
Butyl Methacrylate is a colorless liquid with faint characteristic odor of esters. Its molecular formula is C8H14O2 and its molecular weight is 142.2 g/mol. It boils at 160 °C, melts at -50 °C, is very soluble in water.
Under the GHS it carries the signal word Warning. It is classed as flammable agents - 2nd degree.
02 · Identifiers
Butyl Methacrylate identifiers and molecular data
Butyl Methacrylate CAS number and EC number
Butyl Methacrylate molecular formula and molecular weight
Other names for Butyl Methacrylate
- n-butyl methacrylate
03 · GHS classification
Butyl Methacrylate hazard classification
Harmonised classification under CLP Annex VI. This is the legally binding classification in the EU; other jurisdictions may differ.
Butyl Methacrylate pictograms and signal word
Butyl 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 |
| Serious eye damage/eye irritation GHS chapter 3.3 | Category 2A | H319 | 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.
Butyl Methacrylate hazard statements (H-codes)
| Code | Hazard statement |
|---|---|
| H226 | Flammable liquid and vapour. |
| H335 | May cause respiratory irritation. |
| H315 | Causes skin irritation. |
| H319 | Causes serious eye irritation. |
| H317 | May cause an allergic skin reaction. |
This page lists only the codes assigned to Butyl 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 Butyl 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 Butyl 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
Butyl Methacrylate precautionary statements
CLP Annex VI assigns 17 precautionary statements to Butyl 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
Butyl 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 | n -бутилов метакрилат |
| Spanish español | Metacrilato de n -butilo |
| Czech čeština | butyl-methakrylát |
| Danish dansk | n -butylmethacrylat |
| German Deutsch | n -Butylmethacrylat |
| Estonian eesti | n -butüülmetakrülaat |
| Greek ελληνικά | μεθακρυλικός n -βουτυλεστέρας μεθακρυλικό n -βουτύλιο |
| English English | n -butyl methacrylate |
| French français | méthacrylate de n -butyle |
| Croatian hrvatski | n -butil-metakrilat |
| Italian italiano | n - butilmetacrilato |
| Latvian latviešu | n -butilmetakrilāts |
| Lithuanian lietuvių | n -butilmetakrilatas |
| Hungarian magyar | n -butil-metakrilát |
| Maltese Malti | metakrilat ta’ n -butil |
| Dutch Nederlands | n -butylmethacrylaat |
| Polish polski | metakrylan butylu ester butylowy kwasu metakrylowego |
| Portuguese português | metacrilato de n -butilo |
| Romanian română | metacrilat de n -butil |
| Slovak slovenčina | n -butyl-metakrylát |
| Slovenian slovenščina | n -butil metakrilat |
| Finnish suomi | n -butyylimetakrylaatti |
| Swedish svenska | n -butylmetakrylat |
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
Butyl Methacrylate GHS label elements
Everything CLP Annex VI fixes for Butyl Methacrylate, laid out the way it appears on a label. The greyed lines are the parts only the supplier can fill in.
Warning
Butyl Methacrylate
- Flammable liquid and vapour.
- May cause respiratory irritation.
- Causes skin irritation.
- Causes serious eye 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:
- IF IN EYES:
- Get medical advice/attention.
- If skin irritation occurs:
- If skin irritation or rash occurs:
- If eye irritation persists:
- Remove contact lenses, if present and easy to do. Continue rinsing.
- 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 Butyl Methacrylate in the GHS label constructor →
07 · Health hazards
Butyl Methacrylate health hazards and exposure limits
Butyl Methacrylate hazard summary
A skin, eye, and respiratory tract irritant; May cause skin sensitization; [ICSC] An irritant; May cause skin sensitization; [MSDSonline] Danger of skin sensitization; [MAK] n-Butyl methacrylate, stabilized (UN2227) has warning of explosive polymerization; [ERG 2016] See ACRYLIC RESINS (MONOMERS).
Source: Haz-Map, Information on Hazardous Chemicals and Occupational Diseases
Butyl Methacrylate carcinogenicity classification
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.
08 · Physical and chemical properties
Butyl 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.
Butyl Methacrylate boiling point
| Property | Value | Conditions | Source |
|---|---|---|---|
| Boiling point | 160 °C (320 °F) | HSDB | |
| 163 °C (325.4 °F) | ICSC | ||
| 163 °C (325.4 °F) | at 760 mmHg | DOE PAC |
Butyl Methacrylate melting point
| Property | Value | Conditions | Source |
|---|---|---|---|
| Melting point | -50 °C (-58 °F) | ICSC | |
| -75 °C (-103 °F) | DOE PAC | ||
| -75 °C (-103 °F) | below this value | HSDB |
Butyl Methacrylate density
| Property | Value | Conditions | Source |
|---|---|---|---|
| Density | 0.9 g/cm³ | ICSC | |
| 0.8936 g/cm³ | at 20 °C | HSDB | |
| 0.8975 g/cm³ | at 20 °C | CAMEO |
Butyl Methacrylate solubility
| Property | Value | Conditions | Source |
|---|---|---|---|
| Solubility | Very soluble in ethyl ether, ethanol | HSDB | |
| Insoluble (NTP, 1992) | CAMEO | ||
| In water, 800 mg/L at 25 °C | at 25 °C | HSDB |
Butyl Methacrylate vapor pressure
| Property | Value | Conditions | Source |
|---|---|---|---|
| Vapor pressure | 1.8 mmHg | at 20 °C | CAMEO |
| 2.2502 mmHg | at 20 °C | ICSC | |
| 2.12 mmHg | at 25 °C | HSDB |
Butyl Methacrylate flash point
| Property | Value | Conditions | Source |
|---|---|---|---|
| Flash point | 52.22 °C (126 °F) | HSDB | |
| 50 °C (122 °F) | ICSC |
Butyl Methacrylate autoignition temperature
| Property | Value | Conditions | Source |
|---|---|---|---|
| Autoignition temperature | 294.44 °C (562 °F) | HSDB | |
| 290 °C (554 °F) | ICSC |
Butyl Methacrylate lower explosive limit (LEL)
| Property | Value | Conditions | Source |
|---|---|---|---|
| Lower explosive limit (LEL) | 2 % by volume | HSDB |
Butyl Methacrylate upper explosive limit (UEL)
| Property | Value | Conditions | Source |
|---|---|---|---|
| Upper explosive limit (UEL) | 8 % by volume | estimates | HSDB |
| 8 % by volume | HSDB |
Butyl Methacrylate vapor density
| Property | Value | Conditions | Source |
|---|---|---|---|
| Vapor density | 4.8 (air = 1) | HSDB | |
| 4.9 (air = 1) | CAMEO |
Values compiled from PubChem Laboratory Chemical Safety Summary. Temperatures converted to Fahrenheit for reference.
09 · Fire and explosion
Butyl 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.
Butyl Methacrylate fire potential
Flammable
Source: Hazardous Substances Data Bank (HSDB)
10 · Handling and storage
Butyl Methacrylate storage and handling
Butyl Methacrylate safe storage
Fireproof. Separated from oxidants. Cool. Dry. Keep in the dark. Store only if stabilized. Store in an area without drain or sewer access.
Source: ILO-WHO International Chemical Safety Cards (ICSCs)
Butyl 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 the polyfunctional methacrylates ... The methacrylate monomers should not be stored for longer than one year. Shorter storage times are recommended for the aminomethacrylates, ie, three months, and the polyfunctional methacrylates, ie, six months. Many of these cmpd are sensitive to UV light and should, therefore, be stored in the dark. The methacrylic esters may be stored in mild steel, stainless steel, or aluminum. /Methacrylic acid & derivatives/
Source: Hazardous Substances Data Bank (HSDB)
Butyl Methacrylate incompatible materials
May accumulate static electrical charges and cause ignition of its vapors.
Source: Hazardous Substances Data Bank (HSDB)
Butyl Methacrylate reactivity
BUTYL, DECYL, CETYL, EICOSYL METHACRYLATE is a mixture of four esters of methacrylic acid. Reacts 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 with basic (caustic) solutions. Flammable hydrogen is generated by mixing esters with alkali metals and hydrides. Polymerization may occur when heated, exposed to light or mixed with peroxides. Polymerization can generate large quantities of heat. (USCG, 1999).
Source: CAMEO Chemicals
Planning storage for a mix of chemicals? Check Butyl Methacrylate in the storage compatibility matrix →
11 · Transport
Butyl 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.
Butyl Methacrylate under UN 2227 — shipping name, class and packing group
Europe · ADR 2025, Table A
| Proper shipping name (3.1.2) | Class | Classification code | PG | Labels (column 5) |
|---|---|---|---|---|
| n-BUTYL 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) |
|---|---|---|---|
| n-Butyl 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
Butyl Methacrylate — frequently asked questions
What is the CAS number of Butyl Methacrylate?
The CAS number of Butyl Methacrylate is 97-88-1. Its EC number is 202-615-1.
What is the chemical formula of Butyl Methacrylate?
The molecular formula of Butyl Methacrylate is C8H14O2 and its molecular weight is 142.2 g/mol.
What does a Butyl Methacrylate label have to show?
Under CLP Annex VI the label for Butyl Methacrylate carries the pictograms Flame and Exclamation mark and the signal word is Warning.
Is Butyl Methacrylate flammable?
Yes. CLP Annex VI assigns Butyl Methacrylate H226 — flammable liquid and vapour. The flash point reported for it is 52.22 °C (126 °F) (HSDB).
Is Butyl Methacrylate a carcinogen?
CLP Annex VI records no harmonised carcinogenicity classification for Butyl 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. IARC places it in Group 2B: possibly carcinogenic to humans.
What is the boiling point of Butyl Methacrylate?
The boiling point reported for Butyl Methacrylate is 160 °C (320 °F) (HSDB).
What is the melting point of Butyl Methacrylate?
The melting point reported for Butyl Methacrylate is -50 °C (-58 °F) (ICSC).
How should Butyl Methacrylate be stored?
CLP Annex VI assigns Butyl 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 the polyfunctional methacrylates ... The methacrylate monomers should not be stored for longer than one year. Shorter storage times are recommended for the aminomethacrylates, ie, three months, and the polyfunctional methacrylates, ie, six months. Many of these cmpd are sensitive to UV light and should, therefore, be stored in the dark. The methacrylic esters may be stored in mild steel, stainless steel, or aluminum. /Methacrylic acid & derivatives/ (Hazardous Substances Data Bank (HSDB))
Nearby
Substances next to Butyl Methacrylate
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