What are the product standards for domestic and foreign soda ash products?

I found a domestic one, but not a foreign one. Pinyin name: Tansuanna English name: Sodium Carbonate book page number: E5-103 standard number: Na2CO3·10H2O 286.15 Calculated as dry product, this product contains no less than 99.0% Na2CO3. 　　[Properties] This product is colorless, transparent rhombic crystals ； Odorless ； weatherable ； The aqueous solution reacts alkaline when exposed to phenolphthalein indicator solution. 　　This product is easily soluble in water but insoluble in ethanol. 　　[Identification] The aqueous solution of this product shows the identification reaction of sodium salt and carbonate (Chinese Pharmacopoeia 1995 edition, Part II, Appendix III). 　　[Check] Take 0.1g of this product for chloride and check it according to the law (Chinese Pharmacopoeia 1995 edition, Part II, Appendix VIII A). Compared with the control solution made of 7.0ml of standard sodium chloride solution, it must not be more concentrated (0.07%). 　　For sulfate, take 0.2g of this product and check it according to the law (Chinese Pharmacopoeia 1995 edition, Part II, Appendix VIII B). Compared with the control solution made of 6.0ml of standard potassium sulfate solution, it must not be more concentrated (0.3%). 　　For ammonium salt, take 0.25g of this product, add 5ml of water to dissolve, add 1ml of sodium hydroxide test solution, and boil. No ammonia odor should occur. 　　Weight Loss on Drying: Take this product, first dry it at 40-50℃, and then dry it to constant weight at 105℃. The weight loss should be 60.0-63.5% (Chinese Pharmacopoeia 1995 edition, Part II, Appendix VIII L). 　　For heavy metals, take 1.0g of this product, add 4ml of dilute hydrochloric acid and 10ml of water, boil for 5 minutes, let it cool, add 1 drop of phenolphthalein indicator solution and an appropriate amount of ammonia test solution until the solution turns light red, let it cool, add 2ml of acetate buffer (pH3.5) and an appropriate amount of water to make 25ml, check according to the law (Chinese Pharmacopoeia 1995 Edition, Appendix VIII H, Method 1), the heavy metal content should not exceed 20 parts per million. 　　For arsenic salt, take 1.0g of this product, add 22ml of water to dissolve it, add 6ml of hydrochloric acid, and check according to the law (Chinese Pharmacopoeia 1995 edition, Part II, Appendix VIII J, Method 1), it should meet the regulations (0.0002%). 　　[Content Determination] Take about 1.5g of this product, weigh it accurately, add 20ml of water to dissolve, add 1 to 2 drops of methyl orange indicator solution, and titrate with sulfuric acid titrant (0.25mol/L). Each 1ml of sulfuric acid titrant (0.25mol/L) is equivalent to 26.50mg of Na2CO3. 　　【Function and use】Antacid for external use. For ulcers corroded by acids. 　　[Usage and Dosage] Apply 0.5 to 2% solution to the affected area [Storage] Store in an airtight container.