Shandong Huashang Chemical Co., Ltd. is a high-tech enterprise specializing in the research and development, manufacturing, and sales of fine chemicals. Headquartered in Jinan, Shandong, China, we are committed to delivering high-quality products to our global partners. Currently, over 90% of our products are exported to developed markets, including North America, Europe, Japan, South Korea, and the Middle East.
Product Description
Palladium chloride (CAS: 7647-10-1), also known as palladium(II) chloride or dichloropalladium, is a high-purity inorganic transition metal halide with the formula Cl?Pd. It typically appears as dark brown to reddish rhombic crystalline powder, odorless, and slightly hygroscopic. It is synthesized by oxidizing palladium powder with chlorine gas or by dissolving palladium in a mixture of hydrochloric acid and nitric acid. As a key palladium compound, it is widely used in catalysis, electroplating, chemical analysis, and material science due to its excellent catalytic activity and chemical reactivity.
Uses
Catalysis: A core catalyst for organic synthesis reactions, such as the Wacker process (ethylene oxidation to acetaldehyde), Suzuki-Miyaura coupling, and Heck reaction. It is also used in the preparation of supported palladium catalysts and molecular sieves, playing a vital role in fine chemical and pharmaceutical production.
Electroplating & Material Coating: Used in electroplating baths for coating clock parts, electronic components, and decorative materials, improving the corrosion resistance and wear resistance of the substrate. It also serves as a surface activator for non-conductor material plating.
Chemical Analysis & Detection: Employed as an analytical reagent for detecting carbon monoxide leaks in buried gas pipes and for qualitative/quantitative analysis of certain organic compounds. It can also be used to prepare gas-sensitive elements for gas detection systems.
Other Applications: Used in photography toning solutions, the manufacture of indelible inks, and the synthesis of semiconductor metal-containing polymers. It is also a raw material for preparing other palladium compounds and metallic palladium via reduction.
Molecular Formula & Structure
- Molecular Formula: Cl?Pd
- Molecular Weight: 177.33 g/mol
- IUPAC Name: Palladium(II) chloride
- Synonyms: Palladium dichloride; Palladous chloride; PdCl?; MFCD00003558; EC Number: 231-596-2; RTECS Number: RT3500000; UN Number: 1789; Customs Code: 2843900090.
- CAS Number: 7647-10-1
- SMILES Code: Cl(Pd)Cl
- Chemical Structure: An inorganic compound consisting of one palladium(II) ion bonded to two chloride ions, forming a linear coordination structure. It exists in a rhombic crystal system under normal conditions, with lattice constants a=0.382 nm, b=0.335 nm, c=1.102 nm. It can form complex ions such as H?(PdCl?) when dissolved in dilute hydrochloric acid, and can be reduced to metallic palladium by hydrogen or carbon monoxide.
Physical & Chemical Properties
- Appearance: Dark brown to reddish rhombic crystalline powder; odorless; slightly hygroscopic; no visible impurities.
- Density: 4.0 g/cm3 at 25°C (lit.); Melting Point: 678–680°C (lit.); Decomposition Temperature: ~500°C (emits toxic hydrogen chloride fumes when decomposed); Vapor Pressure: 0 Pa at 20°C; Flash Point: Not applicable (non-flammable solid).
- Solubility: Freely soluble in water (55.6 g/L), hydrochloric acid, ethanol, acetone, and hydrobromic acid; forms a red-brown solution when dissolved in dilute hydrochloric acid, generating H?(PdCl?) complex ions.
- Stability: Stable under normal temperature and pressure if stored and used as specified; incompatible with strong oxidants; slightly hygroscopic; decomposes at high temperatures (>500°C) to release toxic fumes; can be reduced to metallic palladium by hydrogen, carbon monoxide, or other reducing agents.
Synthesis & Storage
- Synthesis: Common industrial methods include: 1) Oxidizing palladium powder with chlorine gas at 500°C in a glass tube until the powder turns; 2) Dissolving palladium powder in a mixture of hydrochloric acid and nitric acid, filtering, evaporating the filtrate to dryness, and drying at 100–120°C to obtain the product; 3) Stirring palladium powder in hydrochloric acid while passing air for oxidation, followed by purification, concentration, crystallization, and drying.
- Storage: Store in a cool, dry, well-ventilated warehouse below 30°C; keep tightly sealed in corrosion-resistant lined containers to prevent moisture absorption and contact with air. Packed in 1g, 5g, 25g sealed glass bottles (laboratory grade) or corrosion-resistant drums (industrial grade). Avoid direct sunlight, high temperature, and contact with strong oxidants; keep away from food, feed, and ignition sources. Shelf life: 24 months if unopened and stored properly.
- Handling Precautions: Use in a well-ventilated fume hood; wear full protective equipment (nitrile gloves, chemical-resistant goggles, protective clothing, face shield). It is highly toxic (GHS06) and a strong skin sensitizer, causing eye irritation and skin redness. Avoid inhalation of dust, skin, and eye contact. In case of skin contact, rinse thoroughly with plenty of water; in case of eye contact, flush with water for 15 minutes and seek medical attention immediately. In case of ingestion, do not induce vomiting and seek medical attention promptly. Dispose of waste in accordance with local regulations; package and treat as hazardous waste, do not discharge directly into the environment or sewers.
