aminoguanidinium sulphat
Product Name: aminoguanidinium sulphat
Molecular Formula:C2H14N8SO4
CAS: 966-19-0
Melting Point:206 degrees
Structural Formula:
Use:pharmaceutical, automobile industry, explosive
synthetic method:
(1) It is obtained by the action of hydrazine sulfate and lime nitrogen and neutralization with sulfuric acid to form salt: first, suspend hydrazine sulfate in water, gradually add lime nitrogen under cooling and agitation, control the temperature at about 20 ℃, react for 8h, then filter, wash the filter cake with water, and drain; combine the filtrate and washing solution, neutralize with 50% sulfuric acid at room temperature to pH = 5, filter and remove calcium sulfate, and concentrate the mother liquor through decompression After cooling, white crystals are precipitated, washed with ice water and dried, the yield is about 72%. (2) From the reaction of methyl isothiourea sulfate and hydrazine hydrate, 119ml 42% hydrazine hydrate solution was diluted with equal volume of water, and then it was added to 139g of methyl isothiourea sulfate in 200ml aqueous solution at a temperature of 10 ℃. The methyl mercaptan released from the reaction is absorbed into the sodium hydroxide solution. After the reaction solution is concentrated to 200ml, 95% ethanol of the same volume is added, namely, aminoguanidine sulfate is separated out, and crystallization is filtered out. The mother liquor can also be partially crystallized. Drying the crystal in
|
Index name |
Index Value |
|
|
Appearance |
White crystalline powder |
|
|
Content |
≥98% |
≥99% |
|
Insoluble Substances |
≤0.1% |
≤0.08% |
|
Loss on Drying |
≤0.3% |
≤0.2% |
|
Ignition Residue |
≤0.3% |
≤0.1% |
|
Iron Content (Fe) |
15 ppm |
10 ppm |
|
Free Acid |
≤0.8% |
≤0.5% |
vacuum is the finished product. The yield is 90%.
Storage precautions: store in a cool and ventilated warehouse. The storage temperature should not exceed 37 ° C. It should be stored separately from oxidant and edible chemicals, and mixed storage is forbidden. Keep container sealed. Keep away from fire and heat. The warehouse must be equipped with lightning protection equipment. The air exhaust system shall be equipped with grounding device to remove static electricity. Adopt explosion-proof lighting and ventilation settings. It is forbidden to use spark prone equipment and tools. The storage area shall be equipped with leakage emergency treatment equipment and appropriate receiving materials