A process for making a polymer carrying a plurality of pendant groups SO 2 Z' (where Z' is halogen) comprises reacting with an inorganic acid halide a substantially water-insoluble derivative of the corresponding polymer sulphonic acid with cations of valency 2, 3 or 4. The process is especia...
distilled under reduced pressure to afford 2-phenylpropionic acid (14.3 g, 93%) as apale-yellow liquid. Reference: Organic Syntheses Coll. Vol. 10, 640 3 、亚硝酸钠促进的腈的酸水解示例 A mixture of compound 1 (6.6 g, 35 mmol), conc. H2SO4 (29 ml), AcOH ( 58 ml) and water(115...
维生素B6：有助于保持免疫系统和心脏健康；Magnesium, which helps regulate muscle and nerve function.镁：有助于调节肌肉和神经功能。Watermelon also contains important minerals known as electrolytes, one of which is potassium. Electrolytes are crucial for keeping us hydrated, contracting our muscles, and ...
药典对照品 积分兑换 加入收藏夹 英文名称 : - 产品编号 : BW3210 标准值 : - 规格: 2mL CSA号 : - 标准价格: ￥50.00 优惠价格: ￥0 选择规格: 2mL 选择规格: 品牌: - 基本信息 质检信息 材料安全信息 As:0.233μmol/g, U=2.0% 最近浏览...
Package of Fulvic Acid: in 20kg paper bag, or 1kg, 5kg, 10kg, as requirements Benefits of Fulvic Acid 1. Enhances the up take of nutrition. 2. Promote quicker seed germination and faster root and shoot growth; 3. Provide a valuable source of carbon for soil microorganisms...
Water undergoes autoionization to a small extent; the ionization constant at 25°C is 1.008x10–14: 2H2O(l) ↔ H3O+(aq) + OH¯ Water reacts both as an acid and a base. With bases it reacts as an acid: NH3(aq) + H2O(l) ↔ NH4+(aq) + OH¯; and with acids it react...
ammonium niobium oxalate NH4[NbO(C2O4)2(H2O)2].(H2O) dissolved in water, adding oxalic acid, to precipitate niobic acid, extruding to form a shaped body, which is sprayed with ammonium sulfate as promoter, drying and calcining, adding hexachloroplatanic ac ...
Humizone® Fulvic Acid Powder is a plant growth regulator, and it is a kind of short carbon chain molecule extractible from the natural with high loading capacity and biological activity. Humizone® FA is brown powder with an excellent solubility. It is soluble in water,...
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As organic acids , benzoic acid derivatives are common organic pollutants in naturalwater body. 苯甲酸类化合物是自然水体中的常见有机污染物,属于有机酸. 互联网 In Yan River watershed, oil runoff pollution is an important pollution form of surfacewater body. ...