Sodium Sulfide Flakes – Photography Grade

$12.00$34.99

Chemical and Physical Properties

  • Chemical Name: Sodium Sulfide
  • CAS Number: 1313-82-2
  • Molecular Formula: Na₂S
  • Molecular Weight: 78.04 g/mol
  • Appearance: Yellowish to reddish flakes
  • Odor: Pungent (rotten egg smell due to hydrogen sulfide gas release)
  • Purity: ≥ 60% (Photography Grade)
  • pH (1% aqueous solution): 12.0 – 13.5
  • Solubility: Highly soluble in water; insoluble in organic solvents

Chemical Composition

  • Sodium Sulfide (Na₂S): ≥ 60%
  • Free Alkali (as NaOH): ≤ 1.0%
  • Sodium Carbonate (Na₂CO₃): ≤ 1.0%
  • Iron Content (Fe): ≤ 0.001%
  • Moisture Content: ≤ 0.5%

Physical Properties

  • Form: Flakes (1–5 mm, customizable based on application)
  • Bulk Density: 0.85–0.95 g/cm³
  • Melting Point: ~118°C
  • Decomposition Temperature: Begins to decompose at elevated temperatures, releasing sulfur dioxide.

Description

Sodium Sulfide Flakes (Photography Grade) is a high-purity chemical designed specifically for applications in photographic processes and film development. Known for its excellent solubility and stable composition, it ensures optimal performance in darkroom applications and industrial photography needs.

Applications of Sodium Sulfide Flakes (Photography Grade):

Photographic Processing

  • Black-and-White Film Development:
    • Acts as a reducing agent in film development.
    • Enhances tonal quality and contrast in black-and-white images.
  • Sepia Toning:
    • Used to produce sepia tones in photographic prints by reacting with silver salts.
    • Widely employed in artistic and archival photography.

Photographic Chemicals

  • Developer Solutions:
    • Integral in the preparation of photographic developers.
  • Fixer Formulations:
    • Assists in stabilizing photographic images by removing unreacted silver halides.

Industrial Photography

  • Precision Imaging:
    • Used in photographic processes for industrial purposes such as blueprinting and documentation.
  • Archival Processing:
    • Helps maintain image quality in archival materials for long-term preservation.

Specialized Applications

  • Darkroom Processes:
    • Essential for manual and custom darkroom printing workflows.
  • Artistic Photography:
    • Used in alternative photographic processes and experimental image treatments.

Alternative Applications

While primarily used in photography, Sodium Sulfide Flakes can also find applications in:

  • Chemical Synthesis:
    • As a precursor in the production of other photographic chemicals.
  • Research and Development:
    • In photographic studies and development of new imaging techniques.

Storage and Handling

  • Storage Conditions:
    • Store in a cool, dry, and well-ventilated area.
    • Keep container tightly closed to prevent moisture absorption and decomposition.
  • Shelf Life: 12 months under proper storage conditions.
  • Handling Precautions:
    • Use gloves, goggles, and protective clothing when handling.
    • Work in a well-ventilated area to avoid inhaling fumes.

Safety Information

  • Hazards:
    • Corrosive to skin and eyes.
    • Emits toxic hydrogen sulfide gas when exposed to acids.
  • First Aid Measures:
    • Skin Contact: Rinse with soap and water. Seek medical attention for irritation.
    • Eye Contact: Rinse with water for at least 15 minutes and seek medical advice.
    • Inhalation: Move to fresh air and seek immediate medical attention.

Additional information

Size

100 GRAMS, 250 GRAMS, 500 GRAMS, 1000 GRAMS