■ Developing baths

This product is an essential component of developing baths where it is an oxygen scavenging agent. It is a white granular product that is readily soluble in water.

■ Product data and typical properties

Formula: Na2SO3
Molecular Weight: 126.04
pH of 5% Solution: 9.8
Bulk Density, lb/ft3: 100
Odorless free flowing, white, fine granular crystal that is soluble in water.

■ Main product specifications

Alkalinity (Na2CO3) 0.0 – 0.15%
Sodium Sulfite (Na2SO3) 98.0 – 100.0 %
Heavy Metals (as Pb) 0.0 – 0.002%
Insoluble Matter (Ca, Mg, NH4OH ppt) 0.0 – 0.04%
Iron (Fe) 0.0 – 0.001%
Reaction to Ammoniacal AgNO3 To Pass Test
Thiosulfate (S2O3) 0.0 – 0.01 %
Meets the specification requirements of the American National Standards Institute (ANSI) and International Standards Organization (ISO).

■ Handling and storage

Shelf Life: Nominally 36 months when properly stored in original packaging.
Storage Conditions: Controlled indoor environment that is cool, dry, and well ventilated.

■ Packaging

• 50lb sealed polyethylene bags
• Custom sack sizes upon request