Styrene Monomer (SM), CAS 100-42-5, is also known as vinylbenzene or phenylethene. It is a reactive aromatic monomer used in polymer and unsaturated polyester systems. For procurement review, confirm inhibitor system, assay, water content, and intended polymer process, packaging appropriate for the offered monomer, and applicable safety documentation.
Styrene Monomer (SM) CAS 100-42-5
- CAS: 100-42-5
- Synonyms: Styrene; Styrene monomer; Vinylbenzene; Ethenylbenzene; Phenylethene
- Einecs: 202-851-5
- Molecular Formula: C₈H₈
- Grade: Confirm assay, inhibitor system, and water content
- Package: Confirm packaging suitable for the offered Styrene Monomer and transport requirements
Product Description
Product name: Styrene Monomer (SM)
CAS number: 100-42-5
Molecular formula: C₈H₈
Molecular weight: 104.15 g/mol
EC number: 202-851-5
Other names: Styrene; Styrene monomer; Vinylbenzene; Ethenylbenzene; Phenylethene
Chemical class: a reactive aromatic monomer
Typical physical form: a clear colorless liquid. Confirm the actual offered form against the current specification.
Identity check: styrene monomer, styrene, vinylbenzene, and ethenylbenzene refer to the substance identified by CAS 100-42-5.
Technical context: polymer and unsaturated polyester systems.
Technical use: monomer feed for polymer and unsaturated polyester processing. Product suitability depends on the actual formulation and inhibitor system.
Inhibitor review: confirm the inhibitor system, assay, water content, storage, and transport conditions against the actual offered material.
Procurement review: Confirm inhibitor system, assay, water content, and intended polymer process, packaging appropriate for the offered monomer, and applicable safety documentation for the actual offered material.
Safety: Follow the current SDS and receiving-site controls for the actual offered Styrene Monomer (SM) material.
Use boundary: this page does not confirm a fixed assay, inhibitor concentration, package, or suitability for a specific polymer system.
FAQ - Technical & Supply Chain
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Q:
Are Styrene, Vinylbenzene and Phenylethylene the same monomer?
A: Yes. These names identify styrene, CAS 100-42-5. Styrene is not ethylbenzene or alpha-methylstyrene, which can occur as related materials or impurities but have different CAS numbers and process behavior. Contracts and labels should use the complete identity instead of the abbreviation SM alone. -
Q:
Which batch specifications matter when purchasing Styrene Monomer?
A: Agree GC purity, ethylbenzene and other aromatic impurities, polymer content, water, color, aldehydes, peroxides, sulfur or chloride where relevant, and TBC inhibitor concentration. The inhibitor result must include the sampling and test method because it is a deliberate stability control, not an impurity to be excluded from the grade. -
Q:
What must be controlled during bulk Styrene storage and delivery?
A: Confirm TBC range, loading temperature, expected transit time, tanker cleanliness, previous cargo, seals, vapor-control arrangement and receiving-tank capacity. TBC effectiveness depends on dissolved oxygen, so nitrogen blanketing should not be assumed suitable without an approved storage design. Follow the current SDS, temperature monitoring and polymer-content control procedures.
Ordering & Documentation
Key information for document requests, quotations, and supply planning.
Documents
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Quotation
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Sample & Supply
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Storage & Shipping
Product-specific conditions are confirmed before order.
