Soda ash

Sodium carbonate is white odorless powder or granules at room temperature. With water absorption, 1mol / L moisture (approximately = 15%) is gradually absorbed in the exposed air. Sodium carbonate is easily soluble in water and glycerin. Every 20 grams of water can dissolve 20 grams of sodium carbonate at 20 ℃, and the solubility is maximum at 35.4 ℃. 49.7 grams of sodium carbonate can be dissolved in 100 grams of water, slightly soluble in absolute ethanol, and hardly soluble in propanol. The solution is alkaline and can make phenolphthalein red.

odium carbonate is one of the important chemical raw materials. It is widely used in light industry, daily chemical industry, building materials, chemical industry, food industry, metallurgy, textile, petroleum, national defense, medicine, etc. Detergents are also used in the fields of photography and analysis. Followed by metallurgy, textile, petroleum, national defense, medicine and other industries. The glass industry is a large consumption department of soda ash, which consumes 0.2 tons of soda ash per ton of glass. In the soda ash for industrial use, it is mainly light industry, building materials, chemical industry, accounting for about 2/3: followed by metallurgy, textile, petroleum, national defense, medicine and other industries.

Closed operation, strengthen ventilation. Operators must undergo special training and strictly abide by the operating regulations. It is recommended that operators wear self-priming filter dust masks, chemical safety protective glasses, anti-poison penetration work clothes, and rubber gloves. Avoid generating dust. Avoid contact with acids. Handle lightly when handling to prevent damage to packaging and containers. Equipped with leakage emergency treatment equipment. Empty containers may be harmful residues. When diluting or preparing a solution, alkali should be added to water to avoid boiling and splashing.

Storage considerations

Store in a cool, ventilated warehouse. Keep away from fire and heat. It should be stored separately from acids, etc., and avoid mixed storage. The storage area should be equipped with suitable materials to contain the leakage.

[Prohibited Materials] Strong acid, aluminum, fluorine

GB/T4553-2002

工(gōng)業純堿即是工(gōng)業碳酸鈉，化學(xué)是Na2CO3，為(wèi)其外觀為(wèi)白色的細小(xiǎo)顆粒或結晶粉末。化學(xué)品的純度多(duō)在（質(zhì)量分(fēn)數），又(yòu)叫純堿，但分(fēn)類屬于鹽，不屬于堿。

工(gōng)業純堿是重要的化工(gōng)基本原料之一，應用(yòng)于輕工(gōng)日化、建材、化學(xué)工(gōng)業、食品工(gōng)業、冶金、紡織、石油、國(guó)防、醫(yī)藥等領域，用(yòng)作(zuò)制造其他(tā)化學(xué)品的原料、清洗劑、洗滌劑，也用(yòng)于照相術和分(fēn)析領域。其次是冶金、紡織、石油、國(guó)防、醫(yī)藥及其它工(gōng)業。玻璃工(gōng)業是純堿的比較大消費部門，每噸玻璃消耗純堿。在工(gōng)業用(yòng)純堿中(zhōng),主要是輕工(gōng)、建材、化學(xué)工(gōng)業,約占2/3：其次是冶金、紡織、石油、國(guó)防、醫(yī)藥及其他(tā)工(gōng)業。

此外工(gōng)業純堿還可(kě)分(fēn)為(wèi)三種類别，每個類别都有(yǒu)其獨特的适用(yòng)對象：第一種為(wèi)工(gōng)業用(yòng)重質(zhì)碳酸鈉，主要适用(yòng)于制造顯象玻璃殼、浮法玻璃、光學(xué)玻璃等；第二種為(wèi)一般工(gōng)業鹽及天然堿為(wèi)原料生産(chǎn)的工(gōng)業碳純堿，包括輕質(zhì)碳酸鈉和重質(zhì)碳酸鈉；第三種為(wèi)硫酸鈉型鹵水鹽為(wèi)原料聯堿法生産(chǎn)的工(gōng)業純堿，包括輕質(zhì)碳酸鈉和重質(zhì)碳酸鈉。

執行質(zhì)量标準：

工(gōng)業純堿（輕質(zhì)純堿、重質(zhì)純堿）執行中(zhōng)華人民(mín)共和國(guó)頒發的《工(gōng)業碳酸鈉 gb210.1-2004ii》标準，産(chǎn)品質(zhì)量均達到國(guó)際先進水平。食用(yòng)純堿執行中(zhōng)華人民(mín)共和國(guó)頒發的《食品添加劑碳酸鈉 gb1886-1992》标準。

食用(yòng)純堿質(zhì)量技(jì )術指标： gb1886--1992

指标名(míng)稱 ⅱ類指标

優等品一等品合格品

總堿量（以幹基的na2co3質(zhì)量分(fēn)數計）% ≥99.2 98.8 98.0

氯化鈉（以幹基的nacl的質(zhì)量分(fēn)數計）含量% ≤ 0.700.90 1.20

鐵（fe）的質(zhì)量分(fēn)數（幹基計）% ≤ 0.0035 0.006 0.010

硫酸鹽（以幹基的so4的質(zhì)量分(fēn)數計）% 0.03  

水不溶物(wù)的質(zhì)量分(fēn)數% ≤ 0.03 0.10 0.15

燒失量 2 ） ， % ≤ 0.8 1.0 1.3

堆積密度（g/ml）≥ 0.90 0.900.90

粒度，180μm篩餘物(wù)% ≥70.0 65.0 60.0

食用(yòng)純堿質(zhì)量技(jì )術指标： gb1886--1992

項目指标

總堿量（以幹基的 na 2 co 3 的質(zhì)量分(fēn)數計） % ≥ 99.2

氯化鈉（以幹基的 nacl的質(zhì)量分(fēn)數 計） % ≤ 0.7

鐵（ fe ）的質(zhì)量分(fēn)數（幹基計） % ≤ 0.004

重金屬（以 pb 計）含量， % ≤ 0.001

砷（以 as 計）含量， % ≤ 0.0002

燒失量 1 ） ， % ≤ 0.8

水不溶物(wù) % ≤ 0.03

食用(yòng)純堿質(zhì)量技(jì )術指标： gb1886--1992

輕質(zhì)純堿（kg/袋）重質(zhì)純堿（ kg/ 袋）

采用(yòng)複合塑編袋、柔性集裝(zhuāng)袋包裝(zhuāng)或散裝(zhuāng)