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What are the forms of existence of sodium dithionite?
Physical Properties: Sodium dithionite is classified as a Grade 1 flammable substance. It is also known as Rongalite Commercially, it exists in two forms: Na₂S₂O₄·2H₂O and the anhydrous Na₂S₂O₄. The former is a fine white crystal, while the latter is a light yellow powder. Its relative density is...Read more -
Reducing Agent: Sodium Hydrosulfite
Reducing Agent: Sodium Hydrosulfite Chemical Name: Sodium dithionite. Compared to oxidizing agents, sodium hydrosulfite causes much less damage to fabrics. It can be used on textiles made of various fibers without causing harm, hence the name “hydrosulfite” (implying its safety). It...Read more -
What is the role of sodium hydrosulfite in textile fibers?
Suitable Fibers for sodium hydrosulfite sodium hydrosulfite is suitable for various textile fibers, hence its name “Rongalite.” When used for high-temperature bleaching or stain removal, the fabric fibers must be able to withstand high temperatures without damage. In terms of certif...Read more -
What are the hazards of sodium hydrosulfite?
Sodium hydrosulfite is toxic and can irritate the eyes and respiratory tract mucosa. It is widely used in the textile industry for reduction dyeing, reduction cleaning, printing, decolorizing, and bleaching silk, wool, nylon, and other fabrics. As it contains no heavy metals, fabrics bleached wit...Read more -
What will happen if sodium hydrosulfite is exposed to the air?
When exposed to air, sodium hydrosulfite readily absorbs oxygen and oxidizes. It also absorbs moisture, generating heat and leading to deterioration. It can clump together while absorbing atmospheric oxygen and emit a pungent acidic odor. Na₂S₂O₄ + 2H₂O + O₂ → 2NaHSO₄ + 2[H] Heating or exposure...Read more -
What are the physical properties of sodium hydrosulfite?
Sodium hydrosulfite Physical Properties Sodium hydrosulfite is classified as a Grade 1 moisture-sensitive flammable substance, also known as sodium dithionite. It is commercially available in two forms: hydrated (Na₂S₂O₄·2H₂O) and anhydrous (Na₂S₂O₄). The hydrated form appears as fine white cryst...Read more -
What are the advantages of using sodium hydrosulfite as a reducing agent?
Reducing Agent (Rongalite) Chemical Name: Sodium hydrosulfite Compared to oxidizing agents, Rongalite causes much less damage to fabrics. It can be used on textiles made of various fibers without causing harm, hence the name “Rongalite” (meaning “safe powder” in Chinese)...Read more -
How should enterprises manage sodium hydrosulfite?
Requiring enterprises to implement a dual-personnel, dual-control system for sodium hydrosulfite. Firstly, the warehouse must have designated management personnel and implement a dual-personnel, dual-lock system. Secondly, the procurement officer must verify the quantity, quality, and relevant sa...Read more -
What are the safety supervision and management requirements for enterprises using and storing sodium sulfite (insurance powder)?
Safety Supervision and Management of Enterprises Using and Storing Sodium Hydrosulfite (Insurance Powder) (1) Requiring enterprises using and storing sodium hydrosulfite to establish and implement hazardous chemical safety management systems. Enterprises using and storing sodium hydrosulfite are...Read more -
How many methods are there for producing sodium sulfide?
There are two main methods for producing sodium sulfide. The Glauber’s salt method involves mixing sodium sulfate and coal powder in a 1:0.5 ratio and heating them in a reverberatory furnace to 950°C, with continuous stirring to prevent clumping. The by-product hydrogen sulfide gas must be ...Read more -
Industrial use of sodium sulfide involves more complex scenarios.
Industrial use of sodium sulfide involves more complex scenarios. In dye workshops, workers operate in chemical-resistant suits because sodium sulfide releases toxic gases at high temperatures. Wastewater treatment plants often use it to precipitate heavy metals, requiring strict control of the f...Read more -
How to handle sodium sulfide in laboratory environment?
In laboratory settings, extra caution is required when handling sodium sulfide. Before use, safety goggles and rubber gloves must be worn, and operations are best conducted within a fume hood. Once the reagent bottle is opened, it should be immediately sealed in a plastic bag to prevent absorptio...Read more