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发布日期:2021年10月20日
Anmol IndiaChemicals India青春期撞上更年期1主题曲 插曲_青春期撞上更年期1里面的歌 ,辣文牛奶h高清字幕在线观看全集免费完整版第13集 雪梨影院,麦王争霸抢先睇主题曲 插曲_麦王争霸抢先睇里面的歌有哪些

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Selenium Sulfide USP Grade Manufacturers

Anmol Chemicals Group, established in 1976, is the pioneer manufacturer of Specialty chemicals, Pharmaceutical Excipients, Fragrance & Flavor chemicals in India. Anmol Chemicals Group has manufacturing facilities spread across Western India, representatives in Houston Chicago USA, Dubai and UAE. We also have toll manufacturing units for processing chemicals in a few countries around the world. We make IP, BP, USP, Ph. Eur., FCC or Food Grade, Analytical Reagent Grade, LR or Laboratory Reagent Grade, Pure and Technical Grades of various chemicals. All our items are analyzed to meet the required standards. We can supply the material in grams for your laboratory trial and in tons for your plant scale jobs.

Our manufacturing facility is FDA approved and cGMP, GLP (FDA) Approved, ISO-9001, ISO-14001, ISO/IEC 17025, ISO OHSAS 18000, ISO 22000-2005 HACCP, FSSAI, FSSC-22000, certified. Apart from good manufacturing practice, we also follow good laboratory practice. We are offering products manufactured as per Kosher and Halal approved certified method. We are pre-registered with "Reach" for export to European countries. We can give all solid chemical materials as per specified size or shape. We observe WHO Good manufacturing practice and Good laboratory practice.

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Selenium Sulfide SDS of Manufacturers

青春期撞上更年期1主题曲 插曲_青春期撞上更年期1里面的歌 ,辣文牛奶h高清字幕在线观看全集免费完整版第13集 雪梨影院,麦王争霸抢先睇主题曲 插曲_麦王争霸抢先睇里面的歌有哪些 Selenium Sulfide

Synonyms: Selenium sulphide
CAS Number: 7488-56-4, Molecular Weight: 143.09, Chemical Formula: SeS2, EINECS EC Number: 231-303-8, FEMA: ----,

Selenium Sulfide USP Grade
SeS2 143.09 -- [7488-56-4].
Selenium Sulfide contains not less than 52.0 percent and not more than 55.5 percent of selenium (Se).青春期撞上更年期1主题曲 插曲_青春期撞上更年期1里面的歌 ,辣文牛奶h高清字幕在线观看全集免费完整版第13集 雪梨影院,麦王争霸抢先睇主题曲 插曲_麦王争霸抢先睇里面的歌有哪些

Identification:
A:Filter 20 mL of the solution of Selenium Sulfide prepared as directed in the Assay, and to 10 mL of the filtrate add 5 mL of water and 5 g of urea. Heat to boiling, cool, and add 2 mL of potassium iodide solution (1 in 10): a yellowish orange to orange color is produced, and it darkens rapidly (presence of selenium).
B:Allow the solution obtained in Identification test A to stand for 10 minutes, filter, and to the filtrate add 10 mL of barium chloride: the solution becomes turbid (presence of sulfur).

Tests:
Residue on ignition: not more than 0.2%.
Soluble selenium compounds:
Test solution: Mix 10.0 g of Selenium Sulfide with 100.0 mL of water in a 250-mL flask, allow to stand for 1 hour, with frequent agitation, and filter. To 10.0 mL of the filtrate add 2 mL of 2.5 M formic acid, dilute with water to 50 mL, mix, and adjust, if necessary, to a pH of 2.5 ± 0.5. Add 2 mL of freshly prepared 3,3-diaminobenzidine hydrochloride solution (1 in 200), mix, allow to stand for 45 minutes, and adjust with 6 N ammonium hydroxide to a pH of 6.5 ± 0.5. Transfer to a separator, add 10.0 mL of toluene, shake vigorously for 1 minute, allow the layers to separate, and discard the aqueous phase.
Standard solution: Using 10.0 mL of a solution of selenious acid containing 0.5 :g of selenium per mL, prepare a solution as directed under Test solution, beginning with “add 2 mL of 2.5 M formic acid.”
青春期撞上更年期1主题曲 插曲_青春期撞上更年期1里面的歌 ,辣文牛奶h高清字幕在线观看全集免费完整版第13集 雪梨影院,麦王争霸抢先睇主题曲 插曲_麦王争霸抢先睇里面的歌有哪些 Procedure: Concomitantly determine the absorbances of the toluene layers of the Test solution and the Standard solution in 1-cm cells at 420 nm, with a suitable spectrophotometer, using a blank consisting of the same quantities of the same reagents treated in the same manner as the Test solution: the absorbance of the Test solution is not greater than that of the Standard solution (5 ppm).
Assay:Place about 100 mg of Selenium Sulfide, accurately weighed, in a suitable container, add 25 mL of fuming nitric acid, and digest over gentle heat until no further solution occurs. Cool, transfer the solution to a 250-mL volumetric flask containing 100 mL of water, cool again, dilute with water to volume, and mix. Pipet 50 mL of the solution into a suitable flask, add 25 mL of water and 10 g of urea, and heat to boiling. Cool, add 3 mL of starch TS, then add 10 mL of potassium iodide solution (1 in 10), and immediately titrate with 0.05 N sodium thiosulfate VS. Perform a blank determination, and make any necessary correction. Each mL of 0.05 N sodium thiosulfate is equivalent to 987.0 microgm of Se.

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Manufacturers

ANMOL CHEMICALS
Taloja Mumbai and Ankleshwar, INDIA
Representatives in Houston, Chicago and New York, USA
TEL: (OFF) +91-22-23726950, +9123774610, +9123723564

e-mail:info@anmol.org

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Last updated 5-sep-20

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Selenium Sulfide
青春期撞上更年期1主题曲 插曲_青春期撞上更年期1里面的歌 ,辣文牛奶h高清字幕在线观看全集免费完整版第13集 雪梨影院,麦王争霸抢先睇主题曲 插曲_麦王争霸抢先睇里面的歌有哪些 USP Grade Manufacturers
Selenium Sulfide