Sodium Carbonate Decahydrate Reagent grade A.R. Reagent grade C.P. Specific grade
Item Index Index Index
Assay(Na2CO3.10H2O)% ≥99.0 ≥99.0 ≥99.0
Clarity test Pass Pass Pass
Water insoluble% ≤0.005 ≤0.01 ≤0.02
Chlorides % ≤0.001 ≤0.003 ≤0.005
Sulfur compound(SO4)% ≤0.003 ≤0.005 ≤0.01
Phosphate(PO4)% ≤0.0005 ≤0.002 ≤0.005
Total nitrogen(N) % ≤0.0005 ≤0.001 ≤0.005
Silicates(SiO3)% ≤0.001 ≤0.005 ≤0.01
Mg% ≤0.0003 ≤0.002 ≤0.005
Al% ≤0.0005 ≤0.003 ≤0.005
K% ≤0.003 ≤0.01 ≤0.02
Ca% ≤0.003 ≤0.008 ≤0.01
Fe% ≤0.0002 ≤0.0003 ≤0.001


Packing& Storage

Packing In 25Kg/woven bag lined with double-layer plastic bag
Storage 20℃, 2 years.
Shipping Room temperature in China; may vary elsewhere


General Information

1.1 Chemical & Physical Properties

Common Names Sodium Carbonate Decahydrate | Crystal soda
CAS No. 6132-02-1 Boiling Point (℃) 445.021ºC at 760 mmHg
Molecular Weight 286.14100 Melting Point (℃) 34 °C
Appearance Colorless transparent crystal, easy to weathering in the air. Vapor Specific Gravity N/A
HS Code Flash Point (℃) 222.941ºC
Solubility Dissolved in 2 parts cold water, 0.25 parts boiling water. Soluble in glycerol, insoluble in ethanol Autoignition Temperature (℃) N/A


1.2 Safety Information

Safety Phrases S22-S26
WGK Germany 1
Packaging Group III
Hazard Class N/A


Inhalation Cough. Sore throat. Use local exhaust or breathing protection. Fresh air, rest.
Skin Redness. Burning sensation. Itching. Protective gloves. Remove contaminated clothes. Rinse and then wash skin with water and soap.
Eyes Redness. Pain. Wear safety goggles. First rinse with plenty of water for several minutes (remove contact lenses if easily possible), then refer for medical attention.
Ingestion Abdominal pain. Nausea. Vomiting. Do not eat, drink, or smoke during work. Wash hands before eating. Rinse mouth. Induce vomiting (ONLY IN CONSCIOUS PERSONS!). Refer for medical attention .


1.3 Synthetic Route

1. Add three times the amount of distilled water to the industrial sodium carbonate, heat, stir to dissolve, add an appropriate amount of sodium sulfide according to the total amount of Pb2+, Cu2+, As2O3 contained in the raw materials, stir thoroughly, stand, and filter after PbS, CuS, As2O3 is completely precipitated. In the clear filtrate, add the total volume of 1% hydrogen peroxide and 0.1% activated carbon, and add sodium oxalate according to the Ca2+ seed content in the raw material, stir well, heat to boiling, and filter while hot. The clear filtrate is evaporated and concentrated until the crystalline film is formed, the heating is stopped, the crystallization is cooled, and the centrifugation is centrifuged to obtain the analysis of pure crystalline sodium carbonate. To prepare high-grade pure crystalline sodium carbonate, only the above finished product needs to be recrystallized once.