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Label for Sodium Dithionite 60% with safety instructions and product details.
Sodium Hydrosulfite 60%

Sodium Hydrosulfite 60%

$24.92
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Pickup available at eHouse Rishon

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Sodium Hydrosulfite 60%

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eHouse Rishon

Pickup available, usually ready in 24 hours

eHouse, 58 Derech HaMaccabim
7535998 Rishon LeZion
Israel

+97252540033

Reliable shipping

Flexible returns

Description

Sodium Dithionite (Na₂S₂O₄) — also known as Sodium Hydrosulfite — is a strong reducing agent widely used in preparing indigo vats. It is also used as a non-aggressive alternative to bleach for removing color from dyed fabrics and for whitening antique textiles.

Did you know? Sodium dithionite became a key player in the industrialization of indigo dyeing in the late 19th century, as it made reliable, large-scale reduction possible, transforming natural indigo use around the world.

CAS No.: 7775-14-6
EC Number: 231-890-0
Molar Mass: 174.11 g/mol
HS Code: 2831 10 00

Tips

  • Used only as a reducing agent, does not produce color itself.

  • Ensures indigo is soluble in the vat for even, deep blues.

  • Correct balance with soda ash controls vat pH and dye uptake.

  • Over-reduction may weaken the indigo color; adjust carefully.
Instructions for Use
  • Indigo vat formula (per 1 L water):
    – 5 g indigo
    – 5 g sodium dithionite
    – 12 g soda ash
  • Multiply quantities for the size of vat you need.
  • Dissolve powders thoroughly before immersing fibers.
  • Storage: Keep sealed in a cool, dry place (+2 °C to +30 °C).
  • Packaging: 250 g, double-sealed in plastic zip bags.

Physicochemical Information

  • Density: 2.5 g/cm³ (20 °C)
  • Melting Point: ~100 °C (decomposition)
  • pH (50 g/L solution, 20 °C): 5.5–8.5
  • Solubility: 250 g/L (slow decomposition in water)
Materials & Care
Care Instruction
Safety & Handling

For dyeing use only — not for food, cosmetic, or medical applications.

Strong reducing agent: handle with care.

Wear gloves, dust mask, and protective eyewear when handling powder.

Store in sealed packaging away from moisture, heat, and oxidizing agents.

Avoid inhalation of dust or contact with eyes/skin.

Dispose of spent vats and wastewater responsibly, following local environmental regulations.

Keep out of reach of children and pets.
Storage & Compliance

Store in a cool, dry place away from direct sunlight. Reseal tightly after use.

Naturally derived and carefully processed from trusted sources to ensure safe use in dyeing and textile applications.

This product complies with the General Product Safety Regulation (EU) 2023/988 (GPSR).

Packed and distributed by The Natural Dye Store, Derech Hamaccabim 58, Rishon LeZion, Israel,Contact person Suzanne Tamar Dekel, +972525410033

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