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Sodium Sulfide Nonahydrate USP NF ACS Reagent Grade Supplier, Manufacturer's Representative

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For MSDS Sheet Click MSDS SDS of Sodium Sulfide Nonahydrate Suppliers

Sodium Sulfide Nonahydrate
USP NF ACS Reagent Grade Suppliers
Sodium Sulfide Nonahydrate

Sodium Sulfide USP Grade
Na2S.9H2O 240.18
Sodium sulfide nonahydrate.
Disodium sulfide nonahydrate [1313-84-4].

Sodium Sulfide contains not less than 98.0 percent and not more than 103.0 percent of Na2S.9H2O.

Identification: [NOTE—Conduct this test in a fume hood.] Transfer about 100 mg of Sodium Sulfide, to a suitable container, add 10 mL of 3 N hydrochloric acid, and cover the top of the container with filter paper saturated with a 0.2 M lead acetate solution: a brownish or silvery-black color forms on the paper.
Limit of iron: Dissolve about 5.0 g in 100 mL of water: the solution is clear and colorless.
Limit of sulfite and thiosulfate: Dissolve 3.0 g in 200.0 mL of filtered and degassed water. Add 100.0 mL of 0.2 N zinc sulfate, mix, and allow to stand for 30 minutes. Filter, add 1 mL of starch, and titrate 100.0 mL of the filtrate with 0.01 N iodine: not more than 3.0 mL is required.
Assay: Transfer about 275 mg of Sodium Sulfide, accurately weighed, to a 250-mL beaker, dissolve in 30 mL of filtered and degassed water, and mix. Add 50.0 mL of 0.1 N iodine while mixing, add 2 mL of hydrochloric acid, and allow to stand for 15 minutes in a dark place. Titrate with 0.1 N sodium thiosulfate VS to a pale yellow color. Add 5 mL of starch and titrate with 0.1 N sodium thiosulfate to a clear endpoint. Perform a blank determination, and make any necessary correction. Each mL of 0.1 N sodium thiosulfate is equivalent to 12.01 mg of Na2S.9H2O.


Sodium Sulfide Nonahydrate ACS Reagent Grade
Na2S-9H2O --- Formula Wt 240.18
CAS Number 1313-84-4
NOTE: To enhance stability, storage below 10C is recommended.

REQUIREMENTS
Appearance: Crystals, colorless or with only a slight yellow color
Assay: 98.0% Na2S . 9H2O
MAXIMUM ALLOWABLE
Ammonium (NH4): 0.005%
Sulfite and thiosulfate (as SO4): 0.1%
Iron: Passes test.

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Magnesium Chloride Anhydrous Magnesium Chloride Hexahydrate
Magnesium Sulfate Manganese Chloride
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Sodium Acetate Anhydrous Sodium Acetate Trihydrate
Sodium Butyrate Sodium Diacetate
Sodium Nitrate, Sodium Nitrite Sodium Thiosulfate Pentahydrate
Sodium Thiosulfate Anhydrous Zinc Ammonium Chloride
Zinc Chloride Zinc Sulfate
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26 March, 2018