INDUSTRYPlastics & Rubber Polymers

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Industrial Chemicals

FUNCTIONFlame retardant — Intumescent acid donor / flame-retardant additive

SYSTEMGrade confirmation needed

APPLICATIONPolymer Additives & Processing Aids · Functional Additives

Ammonium polyphosphate (APP), phase II

CAS 68333-79-9 · Chemical product

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Flame retardant

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Function tag evidence & scope

Function tags help find candidates. They do not establish suitability for water-based paint or an EcoSafe rating.

Flame retardant · Intumescent acid donor / flame-retardant additive

Source-defined general function; exact grade, application and formulation compatibility require review. Function reference ↗

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At a glance for your formula

Phase-II ammonium polyphosphate chemistry used as an acid donor in intumescent systems. The CAS identifies APP broadly and does not establish crystal phase, encapsulation or a finished flame-retardant package.

Grade-specific screening values have not been recorded. Consult the selected supplier’s technical reference.

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Not assessed

Awaiting human verification

Documented “green offset” research

Application-specific alternatives for investigation. Review the cited benefit, hazards and performance before selecting a replacement.

Ammonium polyphosphate (APP), phase II

Original: Decabromodiphenyl ether (decaBDE)

Proposed offset: Ammonium polyphosphate (APP), phase II

Use: Reformulated intumescent coating / textile flame-retardant systems using a suitable documented APP grade

Claim to investigate: APP is a phosphorus/nitrogen route assessed among decaBDE alternatives; phase-II APP can supply acid in an intumescent system.

Limits: The mechanism requires a compatible binder, carbon donor and blowing agent; it is not an equal-dose drop-in replacement for decaBDE. Water-based textile use requires an appropriate modified or encapsulated grade; do not transfer AP862 claims to generic APP or AP422. Current exact-grade regional SDS review is required. A July 2025 AP422 SDS lists H351/H361f, so historical alternative status does not establish a blanket lower-hazard conclusion. Verify wash durability, water resistance, smoke and fire performance in the finished article.

EPA alternatives assessment for decabromodiphenyl ether ↗ · Clariant Exolit AP 422 ↗ · Clariant Exolit AP 862 TP ↗ · Clariant Exolit AP 422 USA SDS, revised July 18, 2025 ↗

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Applications, sustainability & review questions

Original material reference ↗

Full technical properties & recorded evidence

Core data coverage: 18.75%

3 of 16 defined fields are recorded with a source. This measures structured information currently on this site, not the completeness of every linked PDF. Missing fields remain in the denominator.

Coverage is separate from scientific accuracy, human verification and EcoSafe assessment. Molecular fields may not apply to a grade or family; they are not filled from another material to increase its score.

See the 16 fields and remaining gaps

Core field	Recorded information
Chemical name	Ammonium polyphosphate (APP), phase II Source ↗
CAS number	68333-79-9 Source ↗
Synonyms	Not yet recorded / may not apply
Molecular formula	Not yet recorded / may not apply
Molecular weight	Not yet recorded / may not apply
IUPAC name	Not yet recorded / may not apply
PubChem CID	Not yet recorded / may not apply
Identity sources	https://www.epa.gov/sites/default/files/2014-05/documents/decabde_final.pdf Source ↗ Source reference recorded for this record's scope; source freshness is a separate review.
Uses	Not yet recorded / may not apply
Hazards	Not yet recorded / may not apply
Appearance	Not yet recorded / may not apply
Density	Not yet recorded / may not apply
Melting point	Not yet recorded / may not apply
Boiling point	Not yet recorded / may not apply
Solubility	Not yet recorded / may not apply
SDS/TDS	Not yet recorded / may not apply

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SUPPLIER REFERENCES

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Documents & supplier information

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Origin, EcoSafe assessment & review history

Awaiting human verification

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EcoSafe assessment: Not assessed · no numerical points or certification.

Manufacturing origin remains source-specific; a supplier address does not establish production origin.

Library source check: November 2, 2026. Sources may require supplier access.