CAS 106-50-3 · Para Phenylenediamine

Para Phenylenediamine: direct from source to Europe

Para Phenylenediamine (CAS 106-50-3) is a crystalline diamine used in polymer curing, fibre production, specialty dyes, pigments and rubber and fuel antioxidants. We supply it as an industrial chemical intermediate for these uses, not for cosmetic or hair-colour formulation.

  • COA, SDS & TDS with every batch
  • REACH status confirmed before quote
  • Samples available for qualification
Purityup to 99%+HPLC purity, premium grade
Lead time3 – 6 weeksOrigin to European port
FormSolid25 kg bags to bulk
Response1 business dayQuotation after receiving your spec
Product identification

Para Phenylenediamine: names, synonyms and identifiers

Buyers search for this material under several names. Whichever one appears on your specification, purchase order or REACH dossier, it is the same compound: Para Phenylenediamine, CAS 106-50-3.

  • Confirmed CAS number on every COA
  • Premium grade with HPLC purity 99%+ available
  • TDS and SDS supplied with every shipment
Common name
Para Phenylenediamine
Synonyms
p-Phenylenediamine · 1,4-Diaminobenzene · PPD
CAS number
106-50-3
Formula / MW
C6H8N2  /  108.14 g/mol
Chemical family
Phenylenediamine
HS code
2921 (amine-function compounds). Confirm the full code with your broker.

⚠ Not the same as Ortho Phenylenediamine (95-54-5) or Meta Phenylenediamine (108-45-2). Always match CAS 106-50-3. PPD is a well-documented skin sensitiser; end use should be confirmed before order.

Technical data

Para Phenylenediamine physical and chemical properties

Key parameters for process engineering, safety planning and storage design. Values are typical; always verify against the current TDS for your lot.

Appearance
White to light tan crystalline solid or flake
Darkens rapidly (pink/purple) on air exposure
Melting point
140–147 °C
Typical value
Boiling point
As per TDS
Supplied with each order
Molecular weight
108.14
g/mol
Molecular formula
C6H8N2
Phenylenediamine
Solubility
Soluble in water
Also soluble in alcohols
Physical form
Solid / flake
At room temperature
Storage
Cool & dry
Sealed, inert atmosphere strongly recommended
Quality & specification

Para Phenylenediamine grade specifications: standard vs premium

Two grades are offered so your process chemist or quality team can pick what suits downstream requirements. COA parameters are confirmed before every shipment.

Parameter
Standard grade
Premium grade
Test method / note
HPLC purity
≥ 98.0%
≥ 99.0%
HPLC area %
Moisture
≤ 0.3%
≤ 0.1%
Karl Fischer titration
Colour (molten, APHA)
≤ 200
≤ 80
APHA / Pt-Co scale
Melting range
138–147 °C
140–147 °C
Capillary method
Appearance
White to light tan crystalline solid or flake
White to light tan crystalline solid or flake
Visual check

All values are specification limits, not guaranteed minima. Actual COA figures for your lot are provided before dispatch. Non-standard specifications are available on enquiry.

Applications

Where Para Phenylenediamine is used

Typical end uses and synthesis routes for European manufacturers, toll processors and laboratories.

Aramid and polymer synthesis

Feed for para-aramid (Kevlar-type) fibres and specialty polymers.

Rubber and fuel antioxidants

Building block for antiozonant and antioxidant chemistry.

Dye and pigment intermediate

Condensation component for specialty colourants and developer chemistry.

Custom synthesis

Starting material for contract synthesis of phenylenediamine derivatives, for industrial use only.

Packaging & logistics

Packed to your site, documented for customs

Para Phenylenediamine is handled as a dangerous good. Every shipment leaves with UN-approved packaging, CLP labelling and the full document set for European import.

Bags

25 kg bags

UN-approved bags or lined fibre packs on pallets, suitable for FCL and LCL.

25 kg net
Drums

200 kg drums

UN-approved steel or fibre drums for higher volume users.

200 kg net
Bulk

Jumbo bags / bulk

Bulk bags for high-volume users, supplied on request for suitable receiving sites.

On request
Document set included: Bill of lading · Commercial invoice · Packing list · Certificate of analysis (COA) · Safety data sheet (SDS) · Dangerous goods declaration (IMDG/ADR) · Certificate of origin · Other certificates on request
Common questions

Para Phenylenediamine: frequently asked questions

Quick answers for European buyers. For anything else, email source@cheloragroup.com.

It is also sold as p-Phenylenediamine, 1,4-Diaminobenzene, PPD. All refer to CAS 106-50-3. Confirm the CAS number with any supplier before ordering.

Price depends on grade, volume, packing, Incoterm and destination port, and moves with raw material markets. Send us your requirement and we will quote in EUR or USD with a landed-cost breakdown, usually within one business day.

Para Phenylenediamine (CAS 106-50-3) is a crystalline diamine used in polymer curing, fibre production, specialty dyes, pigments and rubber and fuel antioxidants. We supply it as an industrial chemical intermediate for these uses, not for cosmetic or hair-colour formulation.

Standard grade offers 98.0% minimum HPLC purity. Premium grade offers 99.0% minimum with lower moisture and better melt colour. Premium is recommended for fibre and polymer routes needing consistent colour and low impurities.

No. We supply PPD as an industrial chemical intermediate, for uses such as polymer, fibre, rubber and pigment chemistry. It is a well-known skin sensitiser and is separately regulated for cosmetic use in the EU; if your application is cosmetic, tell us so we can advise on the correct regulatory pathway, which this supply does not cover.

Para Phenylenediamine is classified as a skin sensitiser and can face REACH, CLP and use-specific restrictions (including separate EU cosmetics regulation for hair-dye use, which this industrial supply does not cover). We confirm the current status for your application before quoting.

Store tightly sealed in a cool, dry place, ideally under inert gas, away from light, air and oxidisers, which cause rapid darkening and discolouration. Use within the shelf life stated on the COA and TDS.

It is treated as a dangerous good (class and UN number per SDS; always confirm on the current SDS). We pack it in UN-approved containers, apply CLP labels and ship through licensed forwarders under IMDG for sea and ADR for European road.

Yes. Laboratory and pilot samples are supplied with a COA and SDS so your team can qualify the grade. Mention sample needs in your enquiry.

REACH status is confirmed before we quote. We advise on importer-of-record arrangements and whether the substance is registered for your use. Send your use descriptor and we will confirm.

Ready to source?

Get your Para Phenylenediamine quotation today

Send us the grade, volume, destination and Incoterm. You will receive a clear price, packaging options and a full document checklist, usually within one business day.

  • Samples to full containers
  • COA, SDS and DG documents included as standard
  • Quote in EUR or USD, your choice of Incoterm