Specialty resins
Used as a reactive intermediate in selected resin synthesis routes.
REACTIVE AROMATIC INTERMEDIATE · CAS 98-83-9
Alpha-Methylstyrene
A reactive aromatic intermediate used in selected specialty resin, polymer-modification, coating, adhesive and fine-chemical value chains.
VERIFIED PRODUCT IDENTITY
Start qualification with the right chemical.
TRPH evaluates each inquiry against the requested application, specification and destination. Final acceptance criteria are defined only in mutually approved commercial documents.
- Product
- Alpha-Methylstyrene
- CAS Number
- 98-83-9
- Molecular Formula
- C₉H₁₀
- Molecular Weight
- 118.18
- Typical form
- Clear to pale-yellow, inhibitor-stabilized liquid
- Industrial role
- Resin intermediate and polymer modifier
TECHNICAL DECISION MAP
AMS qualification from identity to shipment
01Purity, color and impurity limits
02Inhibitor system and storage conditions
03Intended reaction or formulation
04Packaging, quantity and destination
EVIDENCE-BASED BUYER GUIDANCE
How to evaluate Alpha-Methylstyrene without relying on a generic product claim
Alpha-Methylstyrene should be evaluated against a defined purchasing job: resin intermediate and polymer modifier. A useful supplier discussion connects chemical identity, the buyer’s process, measurable acceptance criteria and shipment evidence. It should not assume that a family name, search keyword or typical value is enough to approve a material.
1. Convert the search term into an approved specification
Start by confirming the exact identity and supplied form of Alpha-Methylstyrene. Then turn the critical requirements into written limits and methods. The working review should cover Purity, color and impurity limits, Inhibitor system and storage conditions, Intended reaction or formulation, Packaging, quantity and destination. Where a parameter affects the customer’s process, agree whether it is a contractual limit, a typical value or a batch-reported result. This distinction prevents a quotation from appearing equivalent when the analytical basis is different.
2. Link supplier data to the customer’s validation plan
Supplier documents describe the material, but they do not prove performance in every formulation or production line. For Alpha-Methylstyrene, define a controlled comparison with the current material or an agreed baseline. Record sample identity, dosage or feed basis, process conditions, test methods and pass/fail criteria before the trial. Scale-up should occur only after the buyer’s technical team has reviewed the result and any safety implications.
3. Keep commercial release tied to evidence
Before releasing an order for Alpha-Methylstyrene, align the quotation, approved specification, current SDS and TDS, packaging, label information and destination requirements. For shipment, match the batch number and agreed parameters across the COA, packing list and labels. Any deviation should be documented and resolved before release rather than explained after arrival.
Evidence expected at each decision point
| Decision point | Evidence to review | Buyer decision |
|---|---|---|
| Identity | Full name, CAS Number where applicable, supplied form | Is this the intended material? |
| Technical fit | Specification, methods, application conditions and trial data | Can it meet the process target? |
| Commercial fit | Quantity, packaging, Incoterm, lead time and destination | Is the offer comparable and executable? |
| Release | Batch COA, labels, packing list and inspection evidence | Can the shipment be approved? |
APPLICATION FIT
Where buyers evaluate AMS
Polymer modification
Can help tailor performance in compatible styrenic and specialty polymer systems.
Coatings and adhesives
Evaluated as an upstream resin or chemical intermediate where formulation-compatible.
Fine chemicals
Functions as an aromatic building block in qualified synthesis processes.
RFQ CHECKLIST
Information that improves quotation accuracy.
Sharing these details early helps the technical and logistics teams check suitability without relying on assumptions.
- Purity, color and impurity limits
- Inhibitor system and storage conditions
- Intended reaction or formulation
- Packaging, quantity and destination
- Current SDS, TDS, COA and commercial specification
BUYER FAQ
Frequently asked questions
Is Alpha-Methylstyrene the same as alpha-methylstyrene dimer?
No. Alpha-Methylstyrene is the monomer identified by CAS 98-83-9; its dimer is a different substance. Always use the CAS number and approved specification in purchasing documents.
Why is AMS supplied with inhibitor?
AMS is a reactive monomer. A controlled inhibitor system supports storage and transport stability. Confirm the current inhibitor specification and handling instructions before use.
What application information helps supplier qualification?
Share the process, target purity, inhibitor restrictions, temperature exposure, annual demand, packaging and destination so technical and logistics fit can be reviewed.
Have a target specification?