Inhibitor system
Specify inhibitor chemistry and concentration. Request the manufacturer’s handling and storage guidance for that inhibited grade.
Acrylate / methacrylate monomer
Methyl Methacrylate
Methyl methacrylate is a monomer used as a building block for acrylic materials, resins, and coating applications.
CAS number80-62-6
Molecular formulaC5H8O2
Molecular weight100.12 g/mol
Physical formLiquid
Chemical reference
Know your material.
Methyl methacrylate (MMA) is the methyl ester of methacrylic acid. It is a reactive monomer used in acrylic materials and resin and coating applications. For enterprise qualification, the inhibitor system is a key part of the material specification, alongside purity, water, acidity, and color.
- IUPAC name
- methyl 2-methylprop-2-enoate
- EC number
- 201-297-1
- Common names & synonyms
- MMA · Methacrylic acid methyl ester · Methyl 2-methylpropenoate
- Chemical family
- Acrylate / methacrylate monomer
- PubChem CID
- 6658 ↗
- InChIKey
- VVQNEPGJFQJSBK-UHFFFAOYSA-N
Reference physical properties
Substance reference values, separate from the supplied-grade specification. Conditions and source are shown so your technical team can interpret the data.
| Property | Reference value | Conditions / source |
|---|---|---|
| Appearance | Colorless liquid | NIOSH describes an acrid, fruity odor. [2] |
| Boiling point | 214 °F (approximately 101 °C) | NIOSH reference value. [2] |
| Freezing point | −54 °F (approximately −48 °C) | NIOSH reference value. [2] |
| Specific gravity | 0.94 | NIOSH reference; not a supplier acceptance range. [2] |
| Flash point | 50 °F (10 °C), open cup | Method matters: consult the current SDS for the supplied grade. [2] |
| Water solubility | 1.5% | As reported by NIOSH; conditions are not specified in that entry. [2] |
Technical qualification
Typical product specifications.
These values come from Chemstock’s existing catalogue. They are not current batch results. Confirm the inhibitor level and analytical conditions in the agreed specification; do not infer a test method where the original record provides none.
| Parameter | Published limit / value | Method / conditions |
|---|---|---|
| Assay | 99.8% min. | Confirm analytical method |
| Water content | 0.1% max. | Confirm test method |
| Color, APHA | 10 max. | Confirm test method |
| Inhibitor, MEHQ | 8–15 ppm | Confirm inhibitor system and method |
| Methacrylic acid | 0.005% max. | Confirm acidity determination |
| Specific gravity | 0.942–0.946 | Reference temperature not specified in legacy record |
| Refractive index | 1.4110 | Temperature and wavelength not specified in legacy record |
Qualify against the current specification.
Request the grade-specific technical sheet, analytical methods, and a representative CoA. Batch results belong on the shipment’s certificate of analysis.
Request a technical packageWhat to define with your technical team
Analytical conditions
Agree methods and conditions for assay, water, acidity, color, specific gravity, and refractive index before comparing sources.
Storage & transport planning
Review the supplier SDS, packaging compatibility, storage limits, and dispatch timing with your EHS and logistics teams.
Application fit
Where it works. What to evaluate.
Acrylic materials
Monomer building block for acrylic polymer chemistry.
Qualification focusDefine assay, impurity, inhibitor, and moisture requirements for the intended polymerization process.
Resins & coatings
Used as a monomer or comonomer in resin and coating applications.
Qualification focusReview color, acidity, and inhibitor tolerances against your formulation and process controls.
Specialty formulations
Application-specific suitability depends on the supplied grade and supporting documentation.
Qualification focusState regulated-use requirements explicitly. An industrial catalogue listing does not establish medical or other regulated-use suitability.
Documentation
The detail behind your approval.
Product documents are available on request. Tell us the required grade and destination so we can identify the right documentation for your review.
On request
Safety data sheet
Current safety, handling, transport, and disposal information for the grade and destination.
Include: Required grade, destination country, and preferred language.Request SDSOn request
Technical specification
Current acceptance limits, physical properties, and the relevant analytical methods.
Include: Your internal specification and required test methods.Request TDS / specificationOn request
Certificate of analysis
Batch-specific results for a supplied lot, or a representative CoA for qualification.
Include: Lot / batch number for an existing shipment; otherwise request a representative CoA.Request CoAOn request
Supplier certifications
Source-specific certification and supporting information for your qualification process.
Include: Required certification, manufacturing site scope, and validity requirements.Request Supplier documentationCertificates apply to a named source, site, grade, or batch. Request the scope and current revision needed for your approval process.
Procurement & logistics
Plan the supply around your operation.
Discuss the source, commercial requirements, and delivery schedule before placing an order.
- Inhibited grade
- Legacy catalogue lists 8–15 ppm MEHQ; confirm the currently offered inhibitor system.
- Packaging options
- Request available packaging, net weights, compatibility information, and delivery mode.
- Demand & delivery cadence
- Provide trial requirements, forecast annual volume, and shipment schedule.
- Source & manufacturing origin
- Confirm manufacturer, production site, country of origin, and qualification documents.
- Lead time & shelf life
- Confirm delivery timing and remaining shelf life against supplier storage requirements.
Supplier onboarding or a second-source review?
Share your qualification questionnaire, incoming specification, required documentation, and change-notification expectations with our team.
Discuss supplier qualification EHS review
Safety, handling & storage.
This overview supports initial review and does not replace a current SDS, site risk assessment, or grade-specific handling instructions.
Fire & reactivity
NIOSH identifies MMA as flammable and notes that heat, oxidizers, or ultraviolet light may trigger polymerization. Use the current supplier SDS and grade-specific guidance. Reference [2]
Storage controls
Confirm inhibitor requirements, recommended storage conditions, monitoring, and shelf life with the manufacturer. A generic chemical profile is not a storage-system design.
Transport reference
NIOSH lists DOT ID 1247 for inhibited material. The shipping name, hazard class, and packing group must be verified against the current SDS and shipment documentation. Reference [2]
Market & supplier qualification
Confirm the requirements for your market.
Applicable requirements depend on the source, destination, and end use. Use this list to identify the statements and evidence your team needs; it is not a claim of certification or regulatory approval.
- Chemical inventory & market access
- TSCA, REACH / UK REACH, or other applicable inventory and importer requirements.
- Restricted-substance declarations
- REACH SVHC, RoHS, Proposition 65, or customer-specific restricted-substance lists, where relevant.
- Application-specific grade
- Food, pharmaceutical, personal-care, or other end-use requirements; confirm the exact standard and grade.
- Origin & sustainability evidence
- Country of origin, feedstock declarations, bio-based evidence, and certifications where required.
- Supplier quality qualification
- Relevant site certifications, questionnaire responses, change-notification expectations, and traceability requirements.
Technical questions
Before you qualify this material.
Why is the inhibitor concentration important?
The inhibitor system is part of the supplied monomer grade and its handling requirements. Include the required chemistry and concentration in your specification, and obtain manufacturer guidance before qualification.
Is MMA the same as methacrylic acid?
No. Methyl methacrylate is the methyl ester of methacrylic acid. Use CAS 80-62-6 to identify MMA; acidity reported as methacrylic acid is a separate specification parameter.
Can the industrial material be used for a regulated application?
Suitability must be established for the exact grade and intended use. Request the necessary application-specific documentation rather than relying on a general list of chemical applications.
Sources & information quality
Traceable information.
Reference data checked September 22, 2026. Public references describe the substance; only the current supplier documents establish the specification, certifications, and shipment details for the material you purchase.
- PubChem · CID 6658
Chemical identity, molecular weight, and structure.
- CDC / NIOSH · Methyl methacrylate
Reference physical properties, hazards, and inhibited-material DOT identifier.
- ECHA · substance identity record
EC identifier only. Archived dossier is not evidence of current supplier REACH coverage.
- Chemstock · published product record
Existing typical specifications and applications.