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Monomers

Poly(p-phenylene terephthalamide)

Also known as Kevlar 49, sru, Kevlar 29, monomer-based, Kevlar 49, monomer-based

CAS 25035-37-4Formula C14H14N2O4Molar mass 274.28 g/mol
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Poly(p-phenylene terephthalamide) chemical structure, C14H14N2O4, CAS 25035-37-4
2D chemical structure

Key facts

What buyers check first

All properties
CAS number
25035-37-4
Formula
C14H14N2O4
Molar mass
274.28 g/mol
HS code
291736
Category
Monomers

What is Poly(p-phenylene terephthalamide)?

Plain description, key identifiers and synonyms

Poly(p-phenylene terephthalamide) is a chemical substance with the molecular formula C14H14N2O4 and a molar mass of 274.28 g/mol. Its CAS registry number is 25035-37-4. The IUPAC name is benzene-1,4-diamine, terephthalic acid.

Identifiers

Registry numbers, names and line notations, tap to copy

IUPAC name
benzene-1,4-diamine, terephthalic acid
CAS number
25035-37-4 CAS number cross-checked
Molecular formula
C14H14N2O4
INCI name
POLY-P-PHENYLENE TEREPHTHALAMIDE
InChIKey
STTCDNLESVYWPH-UHFFFAOYSA-N
InChI
InChI=1S/C8H6O4.C6H8N2/c9-7(10)5-1-2-6(4-3-5)8(11)12;7-5-1-2-6(8)4-3-5/h1-4H,(H,9,10)(H,11,12);1-4H,7-8H2
SMILES (canonical and isomeric)
C1=CC(=CC=C1C(=O)O)C(=O)O.C1=CC(=CC=C1N)N

Synonyms

  • Kevlar 49, sru
  • Kevlar 29, monomer-based
  • Kevlar 49, monomer-based
  • p-phenylene-diamine-tere-phthalate

Physical and chemical properties

Measured values and descriptors computed from the structure

Physical and chemical properties

Measured values, check the supplier specification for your grade

No measured properties are recorded for this substance yet. Ask suppliers for a technical data sheet.

Values vary by grade. Ask suppliers for the COA or TDS of the batch you buy.

Computed descriptors

Calculated from the structure, useful for screening and formulation

Molecular weight
274.28 g/molcalc.
Exact mass
274.0954 Dacalc.
LogP (octanol/water)
1.93calc.
Topological polar surface area
126.6 Ųcalc.
Hydrogen bond donors
4calc.
Hydrogen bond acceptors
4calc.
Rotatable bonds
2calc.
Heavy atoms
20calc.
Rings
2calc.
Aromatic rings
2calc.
Fraction sp3 carbons
0calc.
Formal charge
0calc.
Stereocentres
0calc.
Components
2calc.
Lipinski rule of five
Passes (0 violations)calc.

Calculated for screening. Confirm critical figures with the supplier.

Murcko scaffold

The ring system that remains when every side chain is removed

Murcko scaffold of this chemical, c1ccccc1

c1ccccc1

1 ring, 6 atoms, the Benzene ring system.

485,677 other chemicals share this scaffold

Safety and hazards

GHS classification summary, not a safety data sheet

No GHS hazard classification is recorded for this substance yet. That does not mean it is harmless.

GHS classification summary, not a safety data sheet (SDS). Classifications can differ by supplier, grade and concentration. Always check the supplier's SDS.

Poly(p-phenylene terephthalamide) suppliers

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Poly(p-phenylene terephthalamide) price

Indicative price range per kg from live supplier offers

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Uses and applications

What the substance is used for, by industry and function

Cosmetic ingredient, INCI name POLY-P-PHENYLENE TEREPHTHALAMIDE(film forming)

Functional uses

  • Film former

Cosmetic functions

  • Film forming

Regulatory status

Inventories, regulations and trade controls that list this substance

Health and food

  • EU cosmetic ingredient inventory

HS code and trade data

Customs classification and reported world trade statistics

Global trade

World import and export statistics for the HS code Poly(p-phenylene terephthalamide) is traded under.

HS 2917.36Indicative HS code

Terephthalic acid and its salts

World exports in 2024
$7.52B
+7.4% vs 2023, imports $7.31B
2019 to 2024
Top exporters
  1. China42.3%
  2. South Korea21.8%
  3. Thailand11.8%
Top importers
  1. Turkey22.7%
  2. India * partner reported15.8%
  3. United States11.1%

* Partner reported figures, a lower bound.

Reported customs values in USD, not prices.Full trade data

The HS code shown for Poly(p-phenylene terephthalamide) is indicative (it was assigned by structure rules). Confirm the classification with your customs broker before shipping.

Frequently asked questions

Quick answers about Poly(p-phenylene terephthalamide), based on the data on this page

What is Poly(p-phenylene terephthalamide)?

Poly(p-phenylene terephthalamide) is a chemical substance with the molecular formula C14H14N2O4 and a molar mass of 274.28 g/mol. Its CAS registry number is 25035-37-4. The IUPAC name is benzene-1,4-diamine, terephthalic acid.

What is the CAS number of Poly(p-phenylene terephthalamide)?

The CAS registry number of Poly(p-phenylene terephthalamide) is 25035-37-4.

What is the molecular formula and weight of Poly(p-phenylene terephthalamide)?

The molecular formula of Poly(p-phenylene terephthalamide) is C14H14N2O4 and its molar mass is 274.28 g/mol.

What is Poly(p-phenylene terephthalamide) used for?

Known uses and roles of Poly(p-phenylene terephthalamide) include thickeners in cosmetics and personal care, monomers in plastics and polymers, film forming and film former.

Is Poly(p-phenylene terephthalamide) hazardous?

No GHS hazard classification for Poly(p-phenylene terephthalamide) is recorded on CompoundList yet. That does not prove it is safe. Always read the supplier safety data sheet.

What is the HS code of Poly(p-phenylene terephthalamide)?

Poly(p-phenylene terephthalamide) is usually classified under HS code 291736 (Terephthalic acid and its salts). This is indicative, confirm it with your customs broker before shipping.

Where can I buy Poly(p-phenylene terephthalamide)?

Post a free request on CompoundList and suppliers of Poly(p-phenylene terephthalamide) will send you quotes. Your contact details stay private until you accept a quote.

What is the price of Poly(p-phenylene terephthalamide)?

Suppliers quote Poly(p-phenylene terephthalamide) on request because prices depend on grade, purity, quantity and destination. A free request on CompoundList gets you several quotes to compare.

Guides for buyers

Practical guides that help when you source, ship or handle Poly(p-phenylene terephthalamide)

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Data last updated 7 Oct 2026. Details may have changed, please confirm them with the supplier. Report an error on this page
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