Nylon color and heat stabilizer
Added during polyamide polymerization to limit discoloration and improve heat stability.
BZPA
Phenylphosphinic Acid Supplier from China
Phenylphosphinic acid (benzenephosphinic acid) is a phosphorus intermediate and a color and heat stabilizer for polyamide, used in nylon polymerization, phosphorus flame-retardant chemistry and dye, pesticide and pharmaceutical synthesis. SUNCHEM supplies it with a batch COA on every shipment.
CAS 1779-48-2 · C₆H₇O₂P · Benzenephosphinic acid
- Lot COA with every shipment
- Samples for your trials
- Technical support for your trial
Product overview & key benefits
Phenylphosphinic acid has a reactive P–H bond and an acidic P–OH group on a phenyl ring, which makes it both a mild reducing agent and a useful phosphorus building block. In polyamide production it is added during polymerization as a catalyst and stabilizer that helps nylon keep its color and heat stability. It is also an intermediate for phosphorus-based flame retardants and for dye, pesticide and pharmaceutical synthesis.
Assay, moisture and related phosphorus acids are the parameters most buyers compare.
Phosphorus building block
A P–H intermediate for phosphinate flame retardants and other organophosphorus chemistry.
Quoted to your limits
We quote against your assay and impurity limits and send the batch COA for each lot.
Technical specifications
| Parameter | Typical value |
|---|---|
| Product name | Phenylphosphinic Acid |
| Synonyms | Benzenephosphinic acid; hydroxyphenylphosphine oxide; BZPA |
| CAS No. | 1779-48-2 |
| Molecular formula | C₆H₇O₂P |
| Molecular weight | 142.09 |
| Appearance | White crystalline powder |
Assay, moisture and related-substance limits depend on the producer grade and are stated on the TDS and batch COA; the limits for your order are confirmed in the quotation and contract.
Applications by Industry
Where phenylphosphinic acid is used, and what to confirm before you switch supply.
Polyamide (nylon) production
Catalyst and color/heat stabilizer added during nylon polymerization; also used as a promoter in polyester resin curing.
Check before trial
- Polymer type and addition point
- Dosage you use today
- Assay and moisture limits
Flame retardants & phosphorus chemistry
Intermediate for phosphinate flame retardants and other organophosphorus compounds.
Check before trial
- Target product and route
- Related-substance limits
- Sample size for a pilot run
Dye, pesticide & pharmaceutical synthesis
A phosphorus building block for dye, pesticide and pharmaceutical intermediates.
Check before trial
- Purity for your step
- Documents your QA team needs
- Annual volume
Selection & comparison
Choosing for your process
| Your requirement | What usually works |
|---|---|
| Polyamide color stabilization | Phenylphosphinic acid at the dosage of your current recipe |
| Flame-retardant synthesis | Specify assay and related phosphorus-acid limits |
| Replacing an existing supplier | Send your current TDS or COA; we quote against the parameters you approve |
Packaging & storage
Packaging
Pack size is confirmed with the quotation.
Storage
Keep containers closed in a cool, dry place away from oxidizers and bases. It is acidic and irritating — follow the SDS.
From first email to approved supply
Name the use
Polyamide, flame retardant or synthesis: tell us which one and the product you make.
Compare the numbers that matter
Assay, moisture and related phosphorus acids. Ask for them on the same COA template as your incoming inspection.
Check in your process
For nylon, compare color and viscosity of a trial batch against your current stabilizer.
Trial, then lock the spec
Run a sample in your own process and keep the approved lot COA as the reference for contract limits.
Tell us your requirement. We match the grade.
Tell us how you use phenylphosphinic acid, the quantity and the destination port. Add your current specification and we will quote against it.
| Information | Example |
|---|---|
| Application | Polyamide, flame retardant, synthesis |
| Required specification | Assay, moisture, related substances |
| Quantity | Trial order / monthly / annual volume |
| Destination | Country and port |
| Documents needed | COA, SDS, TDS |
Related products
Sodium Hypophosphite
Reducing agent, also used as a color stabilizer in polymer production.
View product →Phenylphosphinic Acid FAQ
What is phenylphosphinic acid used for?
As a catalyst and color/heat stabilizer in polyamide production, as an intermediate for phosphorus flame retardants, and in dye, pesticide and pharmaceutical synthesis.
How does it help nylon?
Added during polymerization, it acts as a catalyst and stabilizer that limits discoloration and improves heat stability of the polymer.
Which parameters should I compare?
Assay, moisture and related phosphorus acids. Send your limits and we will quote against them.
Can I get a sample?
Yes. Tell us your application and planned test, and we will arrange a sample with the TDS and SDS.
