P-Phenylenediamine Dihydrochloride CAS 624-18-0

1. p-Phenylenediamine dihydrochloride is a crucial precursor in producing high-performance polymers, particularly aramid fibers like Kevlar, which are known for exceptional strength and thermal stability .
2. p-Phenylenediamine dihydrochloride CAS 624-18-0 is widely utilized as an intermediate in the synthesis of dyes and pigments for textiles, in hair dye formulations as a colorant, and as an oxidation base .
3. p-Phenylenediamine dihydrochloride serves as an analytical reagent for detecting substances like hydrogen sulfide, amyl alcohol, and blood, and is used in photographic developer formulations .

1. Store p-Phenylenediamine dihydrochloride in a tightly sealed container under an inert atmosphere in a cool, dry place, protected from light, with recommended temperatures below +30°C or refrigerated .
2. Keep p-Phenylenediamine dihydrochloride CAS 624-18-0 strictly away from strong oxidizing agents, acids, and food/feedstuffs due to incompatibility and to prevent hazardous reactions .
3. Handle p-Phenylenediamine dihydrochloride using appropriate personal protective equipment including chemical-resistant gloves, safety goggles, and in a fume hood to minimize dust generation and avoid inhalation .

1. Isolate the spill p-Phenylenediamine dihydrochloride CAS 624-18-0 area, wear full protective equipment including self-contained breathing apparatus, and sweep up solid p-Phenylenediamine dihydrochloride into covered, sealed containers without creating dust .
2. Prevent spilled p-Phenylenediamine dihydrochloride from entering drains or waterways, as the compound is very toxic to aquatic life with long-lasting effects .
3. Personnel cleaning p-Phenylenediamine dihydrochloride spills must use spark-proof tools and dispose of waste according to hazardous material regulations (UN 1673, Class 6.1, PG III) .

1. p-Phenylenediamine dihydrochloride is highly toxic if swallowed (oral LD50 rat: 147 mg/kg), in contact with skin (H311), and if inhaled (H331), with GHS signal word "Danger" .
2. p-Phenylenediamine dihydrochloride CAS 624-18-0 causes serious eye irritation (H319), may cause an allergic skin reaction (H317), and may cause damage to organs through prolonged or repeated exposure (H372) .
3. p-Phenylenediamine dihydrochloride is combustible and when heated to decomposition emits toxic fumes including carbon monoxide, nitrogen oxides, and hydrogen chloride gas .