Титанилоксалат калия

Description

Potassium titanyl oxalate (potassium oxalate titanate) is a complex potassium salt of the titanyl oxalate anion, a coordination compound of titanium(IV) with two oxalate ligands and an oxo group. According to the type of structure, it belongs to chelate oxalate complexes of transition metals with square-pyramidal titanium coordination. Used as a reagent for analysis and as a mordant when treating textile, leather and metal surfaces.

Basic Attributes

• CAS No.: 14481-26-6 (synonyms 1332-44-1, 15955-05-2, 24285-85-6, 40366-48-1, 51621-60-4)
• Chemical formula: C4O9Ti.2K
• Molecular weight: 390.12
• Exact weight: 335.84
• EU number: 238-475-3
• PSA: 159.16
• XLogP3: -4.6955

Physico-chemical properties

• Boiling point: 365.1 °C at 760 mm Hg. Art.

Scope of application

Reagent for analytical chemistry, as well as mordant for cotton and leather. Tanning agent based on potassium titanyl oxalate gives the leather white color, softness, firmness, good elasticity, durable leather body, light fastness, wash fastness and wear resistance; The absorption of titanium tanning liquid by bare skin reaches approximately 95%, which allows replacing traditional chrome tanning agents and significantly reducing the emission of pollutants. The second direction is the treatment of metal surfaces before painting: after treatment, the metal acquires a smooth, durable and brightly sprayed surface, the product is used for treating car bodies, household appliances and other metal products, replacing the phosphating solution and reducing contamination. The third direction is the treatment of the marble surface during grinding and polishing: after using the product, the shine of the stone becomes bright and lasting.

Danger and transportation

• Packing level: III
• Hazard category: 6.1(b)
• Transport codes: UN 2811

Mechanism of action

When tanning leather, titanium ions from an aqueous solution bind to the carboxyl and amide groups of collagen fibers, forming additional cross-coordination bonds between protein chains. This cross-linking increases the welding temperature of the leather, gives the material elasticity and resistance to water without the use of chromium(VI) compounds, the toxicity and carcinogenicity of which limit their use in modern leather production. When processing metal, a thin layer of titanium oxalate complex on the surface performs a function similar to phosphating - it creates a micro-rough conversion film that improves the adhesion of the subsequent paint coating.

Storage and transportation

Considering hazard category 6.1(b) and packing group III, the substance is transported and stored as a toxic solid compound: tightly closed container, transport according to UN code 2811, dry and ventilated room, away from food products and incompatible substances. The solubility of the compound in water facilitates the preparation of working solutions directly on the production site, which reduces the requirements for containers during dry storage.