Sodium Benzenesulfinate

Basic Information of Sodium Benzenesulfinate

CAS No.:	873-55-2
EC No.:	212-842-8
Linear Formula:	C₆H₅SO₂Na
Molecular Weight:	164.16
Appearance:	White to off-white crystalline powder.
Reactivity:	Acts as a nucleophile and a reducing agent.
Melting Point:	>300 °C(lit.)
Boiling Point:	83-84 °C
Density:	1.45[at 20℃]
Solubility:	Soluble in water, methanol, and ethanol.
Stability:	Relatively stable under normal conditions, but sensitive to strong oxidizing agents.
Chemical Structure:

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Primary Applications of Sodium Benzenesulfinate

Sodium Benzenesulfinate's unique combination of reducing power, nucleophilicity, and stability makes it an invaluable compound with diverse applications across several industries:

1. Reducing Agent:

   It is widely used as a reducing agent in organic synthesis, capable of reducing various functional groups. It's particularly effective in the reduction of aromatic nitro compounds to amines, disulfides to thiols, and sulfonyl chlorides to sulfinic acids or their salts.

2. Chemical Intermediate:

   It serves as a versatile chemical intermediate in the synthesis of a wide range of organic sulfur compounds, including sulfones, sulfonamides, and other specialized chemicals. It's crucial for introducing a phenylsulfonyl group into molecules.

3. Pharmaceutical Synthesis:

   Sodium Benzenesulfinate is utilized in the synthesis of numerous pharmaceutical intermediates and active pharmaceutical ingredients (APIs), particularly those containing sulfonyl or sulfone functionalities, enabling the creation of complex drug molecules.

4. Dye and Pigment Industry:

   It finds application in the dye and pigment industry as a reducing agent or as a raw material for the synthesis of certain dyes and colorants.

5. Polymerization Catalyst/Initiator:

   In certain polymerization processes, it can function as a catalyst or initiator, particularly in radical polymerization reactions.

6. Agrochemical Synthesis:

   It can be employed in the synthesis of certain agrochemicals, where its specific chemical properties are advantageous.

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