Zinc Oxide USP

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 Zinc Oxide USP is an inorganic white powder composed primarily of ZnO. It is widely used as a functional additive in rubber, ceramics, glass, paints, and chemical industries. Known for its excellent chemical stability, UV-absorbing capability, and reactivity with acids and alkalis, this grade is tailored for industrial applications where high purity is not mandatory but consistent quality and performance are essential.

Description

Zinc Oxide USP

Primary Uses 


Rubber Industry

  • Activator in Vulcanization: Acts as an activator with stearic acid in the vulcanization of rubber, improving elasticity, tensile strength, and aging resistance.

  • Reinforcing Agent: Enhances mechanical properties and abrasion resistance of rubber compounds.

  • Heat Stabilizer: Helps protect rubber from heat degradation during processing and use.

Ceramics Industry

  • Glazing Agent: Used in ceramic glazes to promote gloss and opacity.

  • Fluxing Agent: Lowers melting point and improves sintering of ceramics and enamels.

Glass Manufacturing

  • Clarifying Agent: Improves transparency and chemical resistance in specialty glass formulations.

  • UV Filter: Used in optical and UV-blocking glass materials.

Paints & Coatings

  • Pigment & UV Blocker: Acts as a white pigment and UV absorber to protect coatings from degradation.

  • Mildew and Corrosion Resistance: Enhances anti-fungal and anti-corrosive properties in protective paints.

Chemical Industry

  • Intermediate: Serves as a starting material for producing zinc salts (e.g., zinc acetate, zinc carbonate).

  • Catalyst Support: Used in petrochemical and fine chemical synthesis as a catalyst or catalyst carrier.

Secondary Uses


Adhesives & Sealants

  • Thickening and Opacity Enhancer: Used in select formulations to improve opacity and viscosity control.

Metallurgy

  • Zinc Source in Alloying: Occasionally added to aluminum and brass to modify properties or for galvanizing baths.

Fertilizers

  • Micronutrient Additive (Industrial Use): Used in technical-grade agricultural formulations to address zinc deficiency in soils.

Lubricants & Greases

  • Additive: Acts as an anti-wear agent and heat stabilizer in specialized greases and lubricants.

Printing Inks & Plastics

  • Pigment & Heat Stabilizer: Offers brightness and thermal stability in inks and plastics, particularly PVC.
KEY PRODUCT FEATURES

Basic Identification Attributes

  • Chemical Name (IUPAC): Zinc oxide

  • Common/Trade Name: Zinc Oxide Tech Grade

  • CAS Number: 1314-13-2

  • HS Code: 2817.00.00

  • Synonyms: ZnO, calamine, zinc white

Physical & Chemical Properties

  • Physical State: Fine white powder

  • Color & Odor: White; odorless

  • Melting Point: ~1,975 °C

  • Boiling Point: Sublimes at ~2,360 °C

  • Solubility: Insoluble in water; soluble in acids and alkalis

  • Density: 5.6 g/cm³

  • Surface Area: Varies by grade; typically ~4–20 m²/g (BET)

Safety & Hazard Attributes

  • GHS Classification:

    • Not classified as hazardous under normal conditions

    • May cause mild skin/eye irritation

    • Harmful to aquatic life in large quantities

  • Toxicity: Low acute toxicity; avoid inhalation of fine particles

  • Exposure Limits:

    • ACGIH TLV (ZnO fume): 2 mg/m³ (TWA), 10 mg/m³ (STEL)

Storage & Handling Attributes

  • Storage Conditions: Store in a cool, dry, well-ventilated area, away from acids

  • Container Type: 25 kg multi-ply paper or HDPE bags

  • Shelf Life: Up to 36 months in sealed packaging under recommended storage

  • Handling Precautions: Avoid inhalation of dust; use PPE during handling

Regulatory & Compliance Attributes

  • Complies with REACH, OSHA, TSCA, and other global chemical safety regulations

  • Listed on international chemical inventories (EINECS, DSL, AICS, etc.)

  • Manufactured under ISO 9001 and ISO 14001 quality and environmental standards

  • RoHS compliant for use in electronics and coatings (when applicable)

  • Not intended for pharmaceutical or food use unless stated

Environmental & Health Impact

  • Biodegradability: Not applicable (inorganic)

  • Ecotoxicity: Harmful to aquatic life in concentrated discharge

  • Bioaccumulation: Negligible

  • Environmental Note: Dispose of waste in accordance with local environmental laws
SAFETY HANDLING PRECAUTIONS

Safety Handling Precautions

  • PPE Required: Gloves, goggles, dust mask/respirator

  • Handling Guidelines: Minimize dust generation; use local exhaust ventilation

  • Storage Measures: Keep containers sealed and clearly labeled

First Aid Measures

  • Inhalation: Move to fresh air; seek medical advice if symptoms persist

  • Skin Contact: Wash with soap and water

  • Eye Contact: Rinse cautiously with water for 15 minutes

  • Ingestion: Rinse mouth; seek medical attention if large amounts are ingested

Firefighting Measures

  • Fire Hazards: Non-flammable

  • Extinguishing Media: Use appropriate media for surrounding materials

  • Hazardous Combustion Products: Zinc oxide fumes (at extremely high temperatures)