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Mubychem Group, established in 1976, is the pioneer manufacturer of Zinc Chloride, Ammonium Chloride, Calcium Chloride, Potassium Chloride, Sodium Acetate, Sodium Thiosulphate, Barium Sulfate, Pharmaceutical, Fragrance & Flavor chemicals in India. Mubychem Group has several manufacturing facilities spread across Western India. |
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Barium Sulfate Manufacturers; Barium Sulphate BP; Barium Sulfate USP
CAS No.:7727-43-7, Molecular Weight: 233.4, Chemical Formula: BaSO4
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Barium Sulfate
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Barium Sulfate
Technical & Pure Barium Sulphate
Also IP BP Ph. Eur. USP ACS AR LR FCC Food Grades
Barium Sulphate BP
BaSO4 233.4 7727-43-7
CHARACTERS
Appearance
Fine, white or almost white powder, free from gritty
particles.
Solubility
Practically insoluble in water and in organic solvents.
It is very slightly soluble in acids and in
solutions of alkali hydroxides.
IDENTIFICATION
A. Boil a suspension of 0.2 g with 5 ml of a 500 g/l solution of
sodium carbonate for 5 min, add 10 ml of water, filter and
acidify a part of the filtrate with dilute hydrochloric acid. The
solution gives the reactions of sulphates.
B. Wash the residue collected in the preceding test with 3 successive small
quantities of water. To the residue add 5 ml of dilute
hydrochloric acid,
filter and add to the filtrate 0.3 ml of dilute sulphuric acid. A white precipitate is formed that is insoluble in
dilute sodium hydroxide solution.
Solution S
To 20.0 g add 40 ml of distilled water and 60 ml of dilute acetic acid. Boil for 5 min, filter and dilute the cooled filtrate to 100 ml with distilled water.
Acidity or alkalinity
Heat 5.0 g with 20 ml of carbon dioxide-free water on a water-bath for 5 min and filter. To 10 ml of the filtrate add 0.05 ml of bromothymol blue solution. Not more than 0.5 ml of 0.01 M hydrochloric acid or 0.01 M sodium hydroxide is required to change the colour of the indicator.
Acid-soluble substances
Maximum 0.3 per cent.
Oxidizable sulphur compounds
Shake 1.0 g with 5 ml of water for 30 s and filter. To the filtrate add 0.1 ml of starch solution, dissolve 0.1 g of potassium iodide in the mixture, add 1.0 ml of a freshly prepared 3.6 mg/l solution of potassium iodate and 1 ml of 1 M hydrochloric acid and shake well. The colour of the solution is more intense than that of a standard prepared at the same time and in the same manner, but omitting the potassium iodate.
Soluble Barium salts
Maximum 10 ppm.
Heavy metals
Maximum 10 ppm.
Loss on ignition
Maximum 2.0 per cent, determined on 1.0 g at 600 ± 50 C.
Barium Sulfate USP
Barium Sulfate USPBaSO4 233.39
Sulfuric acid, barium salt (1:1).
Barium sulfate (1:1) [7727-43-7].
Barium Sulfate contains not less than 97.5 percent and not more than 100.5 percent of BaSO4.
Identification—
A: Mix 0.5 g with 2 g each of anhydrous sodium carbonate and anhydrous
potassium carbonate, heat the mixture in a crucible until fusion is
complete, treat the resulting fused mass with hot water and filter: the
filtrate, acidified with hydrochloric acid, meets the requirements of the
tests for Sulfate.
B: Dissolve a portion of the well-washed residue from
Identification
test A in 6 N acetic acid: the
solution meets the requirements of the tests for Barium.
pH:
between 3.5 and 10.0, in a 10% (w/w) aqueous suspension.
Heavy metals— Boil
4.0 g with a mixture of 2 mL of glacial acetic
acid and 48 mL of water for 10 minutes. Dilute
with water to 50 mL, filter, and use 25
mL of the filtrate: the limit is 0.001%.
Limit of sulfide— To
10 g in a 500-mL conical flask add 100 mL of 0.3 N hydrochloric acid. Cover the mouth of
the flask with a circle of filter paper that has been moistened at the area
over the mouth of the flask with 0.15 mL of lead
acetate TS, the paper being held in place with a string tied around the neck
of the flask. Boil the mixture gently for 10 minutes, taking care to avoid
spattering the paper. Any darkening of the paper is not greater than that
produced by a similarly treated control consisting of 100
mL of 0.3 N hydrochloric acid containing
5 :g of sulfide: not more than 0.5µg per g is
found.
Limit of acid-soluble
substances— Cool the mixture obtained in the test for Limit of
sulfide, add water to restore approximately the original volume, and
filter it through paper that previously has been washed with a mixture of 10
mL of 3 N hydrochloric acid and 90
mL of water, returning the first
portions, if necessary, to obtain a clear filtrate. Evaporate 50
mL of the filtrate on a steam bath to dryness,
and add 2 drops of hydrochloric acid and 10 mL
of hot water. Filter again through acid washed
paper, prepared as directed above, wash the filter with 10
mL of hot water, and evaporate the combined
filtrate and washings in a tarred dish on a steam
bath to dryness. The residue, when dried at 105 for 1 hour, weighs not more
than 15 mg: not more than 0.3% of acid-soluble
substances is found.
Limit of soluble Barium
salts— Treat the residue obtained in the test for Limit of
acid-soluble substances with 10 mL of water,
pass the solution through a filter previously washed with 100
mL of 0.3 N hydrochloric
acid, and add 0.5 mL of 2 N sulfuric
acid. Any turbidity formed within 30 minutes is not greater than that
produced in a similarly treated control consisting of 10
mL of water containing 0.5 mL of 2 N sulfuric acid and 50 :g of barium: not more than 0.001% of
soluble barium salts is found.
Barium Sulfate USP
Barium Sulphate BP
Barium Sulfate manufacturers
Barium Sulphate manufacturers:
S-8, SARIFA MANSION, 2ND FLANK ROAD, CHINCHBUNDER, MUMBAI
400009, INDIA
TEL: (OFFICE) 91-22-23770100, 23726950, 23774610,
23723564. FAX: 91-22-23728264
e-mail:
info@mubychem.com
Cell Call
to Anmol: +91-9821870100
USA & Canadian Customers may Call
773-829-5811
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