497-18-7 Usage
Product Features
Carbohydrazide is a white crystalline thin and short columnar crystal or white powder at room temperature. It is insoluble in alcohol, easily soluble in water with dissolution absorbing heat. It is insoluble in alcohol, ether, and benzene. Owing to that, it is a kind of derivative of hydrazine and thus having strong reduction ability. It is non-toxic, and can replace hydrazine and oximes. It has a broad range of application in industry. For example, it can be used as the oxygen scavenging agent of boiler water in the field of water treatment and is regarded as most advanced materials for oxygen scavenging of boiler water. It has a low toxicity and high melting point with its deoxidizing efficiency being far greater than the current materials used and is a idea product for both safety and environmental protection; it can also be used as a rocket propellant components; moreover, owing to that its hydrogen atoms attached to the nitrogen atom is easily substituted by other groups, it can be used as the cross-linking agents of elastic fibers in the textile field, the formaldehyde scavenger, as well as the antioxidant of carotene pigment. In addition, adding an appropriate amount of carbohydrazide to the phenol fungicides containing can play a role on preventing discoloration and rancidity. As a chemical raw material and chemical industry intermediates, it is widely used in medicine, herbicides, plant growth regulators, dyes and other industries.
Oxygen scavenger of the boiler water
When acting as the oxygen scavenger of boiler water, carbohydrazide may be directly added into the water while its aqueous solution can also be used. The usage amount of carbohydrazide for scavenging 1mol O2 is 0.5mol, and should be appropriately in excess. The proper temperature range is 87.8-176.7 ℃. The optimal time for applying carbohydrazide is after the thermal scavenging of oxygen. The reaction of oxygen and carbohydrazide is as follows:
CON4H6 + 2O2 = 2N2 + 3H2O + CO2
Reference quality standards
Item Index
Appearance: fine white crystals or white short columnar crystals
Purity% ≥98.0%
Free hydrazine ≤250.0mg/L
Loss of weight by drying ≤0.2%
PH (12% aqueous solution) 8.45 ± 1.25
Uses
Different sources of media describe the Uses of 497-18-7 differently. You can refer to the following data:
1. It is widely used in the production of pharmaceuticals, herbicides, plant growth regulators, dyes, etc.(1) carbohydrazide is a derivative of hydrazine with a strong reduction. It can be not only used as the intermediates for producing energy-containing materials, but also can be used directly as the components of explosives and propellants. (2) it can be used as the preservative of refinery equipment and can also be used as the oxygen scavenger of boiler water treatment agent (3) It can be used as the cross-linking agent of the elastic fiber in the field of chemical fiber industry (4) it can be used as the chemical raw materials and chemical industrial intermediates and is widely used in medicine, herbicides, plant growth regulators, dyes and other industries.
It can be used as the component of the rocket propellant, the stabilizer of color development and soap quality, the antioxidants of rubber, the oxygen scavenger of boiler water, and the passivation agent of metal.
Carbohydrazide is a derivative of hydrazine with a strong reduction. It can be used as the intermediate of producing energy-containing materials and also be used directly for the components of explosives and rocket propellant. It can also be used as the oxygen scavenger of boiler water and is the most advanced materials for scavenging oxygen of boiler water in the world today. It has low toxicity, high melting point and a deoxidation efficiency being far greater than the materials currently used. It is an ideal product for both safety and environmental protection. In addition, it can be used as the cross-linking agent of the elastic fiber in the field of chemical fiber industry. It can also be used as the chemical raw materials and chemical industrial intermediates and is widely used in medicine, herbicides, plant growth regulators, dyes and other industries.
The above information is edited by the lookchem of Dai Xiongfeng.
2. Organic intermediate and photographic chemical.
3. Carbohydrazide is widely utilized as a curing agent for epoxide-type resins and as an oxygen scrubber in boiler systems. It is applied in photography to stabilize color developers that produce images of the azo-methine and azine classes. It is used to develop ammunition propellants and stabilize soaps. It is also a useful reagent in organic synthesis.
Category
toxic substances
Toxicity grading
poisoning
Acute toxicity
Intraperitoneal-mouse LD50: 167 mg/kg; Intravenous-Mouse LD50: 120 mg/kg.
Explosive and hazardous characteristics
it is explosive upon heating; it can generate explosive diazide compound upon reaction with nitrous acid.
Flammability and hazard characteristics
thermal decomposition into toxic nitric oxide gas.
Storage characteristics
Treasury: ventilation, low-temperature and drying; it should be stored separately from strong acids and strong oxidants.
Extinguishing agent
Water, carbon dioxide, dry powder, foam.
Chemical Properties
white powder
Definition
ChEBI: A carbohydrazide obtained by formal condensation between hydrazinecarboxylic acid and hydrazine.
Flammability and Explosibility
Nonflammable
Safety Profile
Poison by intravenous
and intraperitoneal routes. Reacts with
nitrous acid to form the explosive carbonic
dazide. When heated to decomposition it
emits toxic fumes of NOx.
Check Digit Verification of cas no
The CAS Registry Mumber 497-18-7 includes 6 digits separated into 3 groups by hyphens. The first part of the number,starting from the left, has 3 digits, 4,9 and 7 respectively; the second part has 2 digits, 1 and 8 respectively.
Calculate Digit Verification of CAS Registry Number 497-18:
(5*4)+(4*9)+(3*7)+(2*1)+(1*8)=87
87 % 10 = 7
So 497-18-7 is a valid CAS Registry Number.
InChI:InChI=1/CH6N4O/c2-4-1(6)5-3/h2-3H2,(H2,4,5,6)
497-18-7Relevant articles and documents
Preparation method of pymetrozine
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Paragraph 0057-0058, (2020/11/26)
The invention provides a preparation method of pymetrozine. The preparation method comprises the following steps: carrying out a hydrazide reaction on carbonic acid diester and hydrazine hydrate to prepare carbohydrazide, carrying out a condensation reaction on the obtained carbohydrazide and 3-formyl pyridine to prepare pyridin-3-yl methylene carbohydrazide, and finally, carrying out a cyclization reaction on pyridin-3-yl methylene carbohydrazide and monochloroacetone to prepare pymetrozine. The method has the advantages of cheap and easily-available raw materials and low cost; technologicalprocess is simple and short, and pymetrozine can be prepared only through three steps; operation is safe and simple, and reaction conditions are easy to realize; little process wastewater is generated, and the method is environment-friendly; the related raw materials and intermediate products are high in stability, high in reaction selectivity, few in side reactions and high in target product yield and purity, and industrial production of pymetrozine is facilitated.
Continuous hydrazide preparation method
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Paragraph 0054-0056; 0087-0089, (2019/04/17)
The invention relates to a continuous hydrazide preparation method. The preparation method includes: in a micro-channel reactor or a pipeline reactor, subjecting esters, anhydrides or acyl chloride tocontinuous reaction with hydrazine or solution of hydrazine under a solvent-free condition or in a solvent to prepare a hydrazide compound. The preparation method is simple, short in technical process, less in waste gas, wastewater and industrial residues, beneficial to environmental production and suitable for industrial production. The adopted reactor is short in reaction time, high in safety and capable of realizing continuous production. The adopted reactor is high in workshop space utilization rate, and large-scale production can be realized. By adoption of the preparation method, solvent recycling can be realized, and production cost is reduced; in addition, high raw material conversion rate, high quality stability and high purity are realized.
Method for preparing pymetrozine
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Paragraph 0052; 0057; 0062, (2018/11/22)
The invention discloses a method for preparing pymetrozine with an aim to provide a synthesis method short in reaction route of the pymetrozine, small in environmental pollution and simple in technology operation, and belongs to the technical field of organic synthesis. The method includes the steps of 1), allowing dimethyl carbonate serving as a raw material to be subjected to hydrazinolysis withhydrazine hydrate to obtain carbazide; 2), subjecting carbazide and smoke aldehyde to condensation reaction to obtain (E)-N'-(pyridine-3-kiya methyl) hydrazine carbon hydrazide; 3), subjecting (E)-N'-( pyridine-3-kiya methyl) hydrazine carbon hydrazide and chloroacetone to condensation reaction to obtain (E)-N'-(Z)-1-chloropropyl-2-subunit)-2-(pyridine-3-kiya methyl) diazanyl-1-carbohydrazide; 4), subjecting (E)-N'-(Z)-1-chloropropyl-2-subunit)-2-(pyridine-3-kiya methyl) diazanyl-1-carbohydrazide to ring formation under the alkaline condition to obtain the pymetrozine.
