Description

p-Phenylenediamine Sulfate is the sulfate salt of p-phenylenediamine, a high-purity aromatic diamine derivative widely used in industrial synthesis and functional formulations. It serves as a critical building block for high-performance dyes, corrosion inhibitors, and polymer precursors—delivering consistent reactivity and batch-to-batch reliability essential for scale-up manufacturing. This compound is primarily sourced by R&D laboratories, specialty chemical manufacturers, and pigment producers across North America, Europe, and Asia-Pacific markets seeking a stable, high-assay form of p-phenylenediamine with enhanced handling safety over the free base. As p-Phenylenediamine Sulfate CAS NO 16245-77-5, it offers improved crystallinity, reduced volatility, and lower acute toxicity compared to the parent amine.

Application

• Intermediate in the synthesis of azo and anthraquinone dyes for textile, leather, and ink applications
• Key component in high-stability photographic developers and toners
• Corrosion inhibitor additive in coolant formulations and metalworking fluids
• Monomer or crosslinker in polybenzimidazole (PBI) and polyimide precursor polymers
• Stabilizer and antioxidant in rubber compounding (especially for nitrile and EPDM elastomers)
• Reagent in analytical chemistry for spectrophotometric detection of nitrites and peroxides
• Building block for conductive polymers and electroactive organic thin films
• Functional additive in hair dye formulations requiring controlled release and reduced skin sensitization potential

Basic Information

Product Name	p-Phenylenediamine Sulfate
CAS No.	16245-77-5
Molecular Formula	C6H8N2·H2SO4
Molecular Weight	216.21 g/mol
Synonyms	1,4-Phenylenediamine sulfate; p-Phenylenediamine monosulfate; 4-Phenylenediamine sulfate; PPD sulfate; p-Diaminobenzene sulfate; 1,4-Diaminobenzene sulfate; p-Phenylenediamine hydrogen sulfate; Benzene-1,4-diamine sulfate
EINECS	240-353-9

Quality Control

Our products undergo rigorous quality testing to ensure compliance with industry standards. Certificates of Analysis (COA) are available upon request. All batches conform to ACS Reagent Grade specifications for aromatic diamines, including strict limits on heavy metals (<5 ppm), residual solvents, and related impurities (e.g., o- and m-phenylenediamine isomers). Assay is verified by HPLC and titration, and identity confirmed via FT-IR and melting point analysis. The material is manufactured under ISO 9001-certified processes and fully compliant with REACH and TSCA regulatory requirements.

Storage

Preserve in a tightly closed container, protected from light. Store at room temperature (15–25°C) in a dry, well-ventilated area. Due to its easily oxidized nature, maintain under inert atmosphere (nitrogen blanket) when unpacked for extended periods. Avoid exposure to moisture and strong oxidizing agents.

Specification

Item	Specification
Appearance	White to off-white crystalline powder
Assay (by HPLC)	≥ 99.0%
Melting Point	210–215°C (decomposes)
Loss on Drying	≤ 1.0%
Heavy Metals (as Pb)	≤ 5 ppm
Chloride (Cl⁻)	≤ 100 ppm
Sulfate (SO₄²⁻)	Conforms
Identification (IR)	Conforms to reference spectrum

Note: Specifications can be tailored. Please contact us for the detailed technical data sheet of a specific grade.