Zinc Carbonate Powder, Zinc Chloride Anhydrous n Solution Suppliers

Teappcm, is the several decades old manufacturer supplier exporter of High Purity Chemicals including Pharmaceutical Grade Excepients like IP BP JP USP Ph Eur FCC Food Grade ACS Reagent Grade of Chemicals in India USA UAE etc. It has several associated manufacturing facilities spread across the globe. Order quantities ranging from grams, killograms to container loads are given equal attention. The participating units have one or more of the certifications like Good Manufacturing Practice, Good Laboratory Practice, ISO-9001, ISO-22000, Halal & Kosher Cettification. We also have "REACH" Preregistration.

Basic Zinc Carbonate Powder, Zinc Chloride USP BP IP ACS Reagent Anhydrous & Solution Suppliers Exporters

Specifications Battery & Pharmaceutical Grade Zinc Chloride:
Assay: 94-98% and 98-99%
Appearance: Snow-white
Ammonia as NH4Cl: 1% maximum and 0.1% maximum
Alkalies and Alkaline Earth: 1% maximum and 0.1% maximum
Iron & Lead: 0.005% maximum & 0.001% maximum
Dry Basis Assay: 99% & 99.5% minimum.

Specification of Zinc Chloride Solution Lye or Brine:
Assay (as ZnCl2):40-42% (It is also offered as 70% Zinc Chloride Solution or as desired by the buyer)
Appearance: Water White Liquid
Iron & Lead: Less than 10 ppm
Specific Gravity: 1.40-1.45.

Assay: Zinc Chloride contains not less than 97.0 percent and not more than 100.5 percent of ZnCl2.
Identification: A solution of it responds to the tests for Zinc and for Chloride.
Limit of oxychloride: Dissolve 1.0 g in 20 mL of water, add 20 mL of alcohol, and mix. To 10 mL of the mixture add 0.30 mL of 1.0 N hydrochloric acid: the solution becomes perfectly clear.
Sulfate: Dissolve 1.0 g in 30 mL of water: 20 mL of this solution shows no more sulfate than corresponds to 0.20 mL of 0.020 N sulfuric acid (0.03%).
Limit of ammonium salts: To 5 mL of a solution (1 in 10) add 1 N sodium hydroxide until the precipitate first formed is re-dissolved, and then warm the solution: no odor of ammonia is perceptible.
Lead: Dissolve 0.50 g in 5 mL of water, and transfer the solution to a color-comparison tube (A). Add 15 mL of Potassium Cyanide Solution (1 in 10), mix, and allow the mixture to become clear. In a similar, matched color-comparison tube (B) place 5 mL of water, and add 2.50 mL of Standard Lead Solution (see Heavy Metals 231 ) and 15 mL of Potassium Cyanide Solution (1 in 10). Add to the solution in each tube 0.1 mL of sodium sulfide TS. Mix the contents of each tube, and allow to stand for 5 minutes: viewed downward over a white surface, the solution in tube A is not darker than that in tube B (indicating not more than 0.005% of lead).
Alkalies and alkaline earths: Dissolve 2.0 g in about 150 mL of water contained in a 200-mL volumetric flask. Add sufficient ammonium sulfide TS to precipitate the zinc completely, dilute with water to volume, and mix. Filter through a dry filter, and reject the first portion of the filtrate. To 100 mL of the subsequent filtrate add 5 drops of sulfuric acid, evaporate to dryness, and ignite: the weight of the residue does not exceed 10 mg (1.0%).
Organic volatile impurities: meets the requirements

CHARACTERS
Appearance: White or almost white, crystalline powder or cast in white or almost white sticks, deliquescent.
Solubility: Very soluble in water, freely soluble in ethanol (96 per cent) and in glycerol.

IDENTIFICATION
A. Dissolve 0.5 g in dilute nitric acid R and dilute to 10 ml with the same acid. The solution gives reaction of chlorides.
B. 5 ml of solution S gives the reaction of zinc.

TESTS
Solution S: To 2.0 g add 38 ml of carbon dioxide-free water R prepared from distilled water and add dilute hydrochloric acid drop wise until dissolution is complete. Dilute to 40 ml with carbon dioxide-free water prepared from distilled water.
pH: 4.6 to 5.5.
Dissolve 1.0 g in 9 ml of carbon dioxide-free water, ignoring any slight turbidity.
Oxychloride: Dissolve 1.5 g in 1.5 ml of carbon dioxide-free water R. The solution is not more opalescent than reference suspension. Add 7.5 ml of ethanol (96 per cent). The solution may become cloudy within 10 min. Any cloudiness disappears on the addition of 0.2 ml of dilute hydrochloric acid.
Sulphates: Maximum 200 ppm.
Aluminium, calcium, heavy metals, iron, magnesium: To 8 ml of solution S add 2 ml of concentrated ammonia R and shake. The solution is clear and colourless. Add 1 ml of disodium hydrogen phosphate solution. The solution remains clear for at least 5 min. Add 0.2 ml of sodium sulphide solution. A white precipitate is formed and the supernatant liquid remains colourless.
Ammonium: Maximum 400 ppm.

Zinc Chloride ACS Reagent Grade Specifications
ZnCl2
Formula Wt 136.30
CAS Number 7646-85-7

MAXIMUM ALLOWABLE
Oxychloride: Passes test
Insoluble matter: 0.005%
Nitrate (NO3): 0.003%
Sulfate (SO4): 0.01%
Ammonium (NH4): 0.005%
Calcium (Ca): 0.06%
Iron (Fe): 0.001%
Lead (Pb): 0.005%
Magnesium (Mg): 0.01%
Potassium (K): 0.02%
Sodium (Na): 0.05%.

Zinc Chloride IP Grade (ZnCl2)
Description: White or practically white, crystalline powder, odorless, very deliquescent
Assay: 95.0 - 100.5
pH: Between 4.6 – 6.0
Aluminum, Calcium, Heavy Metals, Iron & Magnesium: Passes the Test
Ammonium Salts: Passes the Test
Oxychloride: Passes the Test
Sulphate: Passes the Test.

Specifications of Commercial Grade Zinc Carbonate:
Zinc Content: 55% minimum
Iron: 0.02% maximum
Heavy Metals: 0.02% maximum

Zinc Carbonate USP Grade
3Zn(OH)2Â·2ZnCO3 549.01
Basic zinc carbonate.
Zinc subcarbonate [3486-35-9]

Zinc Carbonate contains the equivalent of not less than 70.0 percent of ZnO. (This 70% ZnO is equivalent to 56.1% Zinc. We can also offer Zinc Carbonate of minimum 60% Zinc content.)

Identification: A solution of it in a slight excess of hydrochloric acid responds to the tests for Zinc.
Insoluble matter: Dissolve 10-g Zinc Carbonate in a mixture of 100 mL of water and 7 mL of sulfuric acid, and heat on a steam bath for 1 hour. Filter the solution through a tarred sintered-glass crucible, wash with hot water, dry the crucible at 105 , cool, and weigh: the residue weighs not more than 20 mg (0.02%).
Chloride: A 1.0-g Zinc Carbonate dissolved in a mixture of 20 mL of water and 3 mL of nitric acid shows no more chloride than corresponds to 0.03 mL of 0.02 N hydrochloric acid (0.002%).
Sulfate: Dissolve 10.0-g Zinc Carbonate in a mixture of 75 mL of water and 10 mL of hydrochloric acid, and filter. Neutralize the filtrate with ammonium hydroxide, dilute with water to 100 mL, and mix. To 10.0 mL of this solution add 1 mL of 0.6 N hydrochloric acid and 1 mL of barium chloride TS, mix, and allow to stand for 10 minutes. This test solution shows no more turbidity, if any, than that produced in a solution containing 0.10 mL of 0.02 N sulfuric acid and the same quantities of reagents used to prepare the test solution (0.01%).
Iron: Dissolve 1.0-g Zinc Carbonate in 20 mL of water and 3 mL of hydrochloric acid: the limit is 0.002%.
Lead: the limit is 5 ppm.
Substances not precipitated by ammonium sulfide: Dissolve 1.0-g Zinc Carbonate in 10 mL of water and 2 mL of sulfuric acid, dilute with water to 80 mL, add 10 mL of ammonium hydroxide, and pass hydrogen sulfide through the solution for about 30 minutes. Dilute with water to 100 mL, and allow the precipitate to settle. Decant the supernatant through a filter, and transfer 50 mL of the clear filtrate to a tarred dish, evaporate to dryness, ignite, gently at first and finally at 800 Â± 25 , cool, and weigh: the weight of the residue does not exceed 2 mg (0.4%).

Basic Zinc Carbonate Powder, Zinc Chloride Anhydrous & Solution Suppliers:

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