Structural formula

• Numbering system
• Physical property data
• Toxicological data
• Ecological data
• Molecular structure data
• Computing chemical data
• More
  • Properties and Stability
  • Storage method
  • Synthesis method
  • Purpose

Numbering system

CAS number:50-01-1

MDL number:MFCD00013026

EINECS number:200-002-3

RTECS number:MF4300000

BRN number:3591990

PubChem ID:None

Physical property data

1. Properties: white or slightly yellow lumps

2. Melting point (℃): 181-183

3. Relative density (g/mL, 20/4 ℃): 1.354

4. Solubility: 228g can be dissolved in 100g water at 20℃, 76g can be dissolved in 100g methanol, and 24g can be dissolved in 100g ethanol. Almost insoluble in acetone, benzene and ether.

5. PH value (4% aqueous solution, 25℃): 6.4

Toxicological data

The oral LD50 for rabbits is 500mg/kg. For protective methods, see thiosemicarbazide.

Ecological data

None

Molecular structure data

1. Molar refractive index: 12.89

2. Molar volume (cm³/mol): 37.9

3. Isotonic specific volume (90.2K ): 114.4

4. Surface tension (dyne/cm): 82.9

5. Polarizability (10-24cm3): 5.11

Compute chemical data

None

Properties and stability

This product is relatively unstable and can be hydrolyzed in aqueous solution to form ammonia and urea, so its toxicity is the same as that of urea. Its derivatives are generally more toxic than ureas.

Storage method

None

Synthesis method

Using dicyandiamide and ammonium salt (ammonium chloride) as raw materials, conduct a melting reaction at 170-230°C to obtain crude guanidine hydrochloride, which can be refined to obtain the finished product.

Purpose

1. Can be used as intermediates for medicines, pesticides, dyes and other organic synthesis. It can be used to synthesize 2-aminopyrimidine, 2-amino-6-methylpyrimidine, 2-amino-4,6-dimethylpyrimidine, and is used to manufacture sulfa drugs such as sulfadiazine, sulfamethylpyrimidine, and sulfadimethylpyrimidine. intermediate.

2. Guanidine hydrochloride (or guanidine nitrate) reacts with ethyl cyanoacetate to form 2,4-diamino-6-hydroxypyrimidine, which is used to synthesize the anti-anemia drug folic acid. It can also be used as an antistatic agent for synthetic fibers.

3. It can also be used as a protein denaturant.

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