Ingredient Dictionary

BUTYL METHACRYLATE

Butylmethacrylate is an enoate ester.

Definition

Butylmethacrylate is an enoate ester.

Source: PubChem

US FDA substance register · UNII R5QX287XXU · registered name N-BUTYL METHACRYLATE · single chemical substance

Source: US FDA Unique Ingredient Identifier (UNII)

Cosmetic roles

Listed as a fragrance-composition material (not a claim that it adds scent)FRAGRANCEAdjusts thicknessVISCOSITY CONTROLLINGLeaves a thin film where appliedFILM FORMING

Safety & regulatory references

Not classified under Korea’s toxic-substance GHS list · existing chemical substance

Source: Korea toxic substances GHS register (NIER)

Reviewed by CIR: Methacrylate Ester Monomers

Source: US Cosmetic Ingredient Review (CIR)

Reviewed by CIR: Final Report on the Safety Assessment of Methacrylate Ester Monomers Used in Nail Enhancement Products

Source: US Cosmetic Ingredient Review (CIR)

More data — names, identifiers, properties, test records, literature

Official labels & definitions

JCIA labelling name メタクリル酸ブチル: 本品は、メタクリル酸とブタノール（＊）のエステルであり、次の化学式で表される。

Source: JCIA labelling names (Japan)

Names & identifiers

BUTYL METHACRYLATEINCI부틸메타크릴레이트Korean label name (MFDS standard)2-Propenoic acid, 2-methyl-, butyl esterSynonymメタクリル酸ブチルJapanese labelling name

CAS No.chemical registry number: 44914-63-6
CAS No.chemical registry number: 97-88-1
EC No.EU chemical inventory number: 202-615-1
EC No.EU chemical inventory number: 256-170-3
DTXSIDUS EPA chemical ID: DTXSID4024696
DTXCIDUS EPA compound ID: DTXCID704696

IUPAC: Butyl 2-methylprop-2-enoate
Molecular formula: C8H14O2
Molecular weight: 142.198 g/mol

Measured properties

Appearance: Butyl, decyl, cetyl, eicosyl methacrylate appears as a colorless liquid with a mild odor. Less dense than water and insoluble in water. Hence floats on water. (USCG, 1999) · N-butyl methacrylate appears as a clear colorless liquid. Flash point 130 °F. Less dense (7.5 lb / gal) than water and insoluble in water. Hence floats on water. Vapors heavier than air. Used to make resins adhesives, and oil additives.
Odour: Faint characteristic odor of esters
Boiling point: 326.3 to 338.9 °F at 760 mmHg (NTP, 1992) · 160 °C
Melting point: less than -58 °F (NTP, 1992) · freezing point: less than -75 °C
Solubility: Insoluble (NTP, 1992) · Very soluble in ethyl ether, ethanol
Density: 0.8975 at 68 °F (USCG, 1999) - Less dense than water, will float · 0.8936 g/cu cm at 20 °C
Viscosity: 3.116 cP at 70 °F · 1.02 mm²/s at 24 °C
Colour: colourless
Melting/freezing point: -50 ℃
Initial boiling point and range: 163 ℃
Flash point: 50 ℃(c.c.)
Upper/lower flammability or explosive limits: 8 / 1 %
Vapour pressure: 0.3 ㎪(20℃)
Water solubility: 0.6 g/100㎖
Vapour density: 4.9
Relative density: 0.9
n-Octanol/water partition coefficient (Kow): 2.88
Auto-ignition temperature: 290 ℃
Molecular weight: 142.2

Values measured on the substance itself. The KOSHA data are a reference for writing and reviewing safety data sheets, not a specification for a commercial raw material.

Source: PubChem · KOSHA safety data sheets (Korea)

What products actually use it for

What the 17 products reported to the US EPA with this ingredient use it for. Products outside cosmetics are included, so the top few rows are its main uses.

Binder4
Monomers4
Intermediate3
Fragrance2
Deodorizer1
Elasticizer1
Film former1
Viscosity modifier1

Source: US EPA CompTox dashboard

Irritation and sensitisation studies

14 skin studies and 5 eye studies are on record.

Classed as moderate2

The study conclusions largely agree (100%). These tests are on the raw material itself; irritation at the amount in a finished product is a different question.

See all 19 studies

Category 6.3A (Category 2)
Skin Irritation · Read Across
Category 6.5B (Category 1)
Skin Sensitization · Read Across
Not classified
Skin Irritation · Screening
High Frequency of Sensitization
skin sensitisation: in vivo (LLNA) · Screening · according to OECD Guideline 429 (Skin Sensitisation: Local Lymph Node Assay) individual approach (adopted 22 July 2010) according to EU Method B.42 (Skin Sensitisation: Local Lymph Node Assay) (dated May 30, 2008)
Moderate or Mild Irritation
skin irritation: in vivo · Screening · other guideline: According to appraisal of the safety of chemicals in foods, drugs and cosmetics, FDA (Draize) 1959. according to
Skin Irrit. 2
Skin Irritation · Authoritative
Skin Sens. 1
Skin Sensitization · Authoritative
Sh
Skin Sensitization · Authoritative
Classification not possible
Skin Sensitization · Screening
Moderate or Mild Irritation
skin irritation: in vivo · Screening · OECD Guideline 404 (Acute Dermal Irritation / Corrosion) equivalent or similar to
Severe Irritation
skin irritation: in vivo · Screening · other guideline: Federal Hazardous Substances Labeling Act Regulations, Section 191.12, Federal Register: 29, 13009 (1964). according to
High Frequency of Sensitization
skin sensitisation: in vivo (non-LLNA) · Screening · according to OECD Guideline 406 (Skin Sensitisation)
Ambiguous
skin sensitisation: in vivo (non-LLNA) · Screening · according to other guideline: Magnusson and Kligman, 1969; The Identification of Contact Allergens by Animal Assay - The Maximisation Test, J. Invest. Dermatol., Vol 52, No 3, p 269-276
Moderate or Mild Irritation
skin irritation: in vivo · Screening · OECD Guideline 404 (Acute Dermal Irritation / Corrosion) according to
Moderate or Mild Irritation
eye irritation: in vivo · Screening · other guideline: Federal Hazardous Substances Labeling Act Regulations, Section 191.12, Federal Register: 29, 13009 (1964). according to
Category 6.4A (Category 2A)
Eye Irritation · Read Across
Eye Irrit. 2
Eye Irritation · Authoritative
Moderate or Mild Irritation
eye irritation: in vivo · Screening · OECD Guideline 405 (Acute Eye Irritation / Corrosion) according to EU Method B.5 (Acute Toxicity: Eye Irritation / Corrosion) according to
Not classified
Eye Irritation · Screening