2,4-diamino-6-hydroxypyrimidine

Structural formula

Business number	0175
Molecular formula	C4H6N4O
Molecular weight	126.12
label	2,4-Diamino-6-hydroxypyrimidine, 2,6-Diamino-4-pyrimidinol, 2,6-Diamino-4-pyrimidinone, Heterocyclic compounds

Numbering system

CAS number:56-06-4

MDL number:MFCD00149408

EINECS number:200-254-4

RTECS number:None

BRN number:125006

PubChem number:24278824

Physical property data

1. Properties: Yellow needle-like crystals

2. Density (g/mL, 25/4℃): Undetermined

3. Relative vapor density (g/mL , air=1): Undetermined

4. Melting point (ºC): 260~270

5. Boiling point (ºC, normal pressure): Undetermined

6. Boiling point (ºC, 5.2kPa): Undetermined

7. Refractive index: Undetermined

8. Flash point (ºC): Undetermined

9. Specific rotation (º): Undetermined

10. Autoignition point or ignition temperature (ºC): Undetermined

11. Vapor pressure (kPa, 25ºC): Undetermined

12. Saturated vapor pressure (kPa, 60ºC): Undetermined

13. Heat of combustion (KJ/mol): Undetermined

14. Critical temperature (ºC): Undetermined

15. Critical pressure (KPa): Undetermined

16. Log value of oil-water (octanol/water) partition coefficient: Undetermined

17. Explosion upper limit (%, V/V): Undetermined

18. Explosion lower limit (%, V/V): Undetermined

19. Solubility: Not determined

Toxicological data

None

Ecological data

None

Molecular structure data

1. Molar refractive index: 32.78

2. Molar volume (cm³/mol): 78.8

3. Isotonic specific volume (90.2K ): 262.2

4. Surface tension (dyne/cm): 122.2

5. Polarizability (10^-24cm³): 12.99

Compute chemical data

1. Hydrophobic parameter calculation reference value (XlogP): -1.8

2. Number of hydrogen bond donors: 3

3. Number of hydrogen bond acceptors: 4

4. Number of rotatable chemical bonds: 0

5. Number of tautomers: 17

6. Topological molecular polar surface area (TPSA): 93.5

7. Number of heavy atoms: 9

8. Surface charge: 0

9. Complexity: 205

10. Number of isotope atoms: 0

11. Determine the number of atomic stereocenters: 0

12. The number of uncertain atomic stereocenters: 0

13. The number of determined chemical bond stereocenters: 0

14. Uncertain chemical bond stereocenters Quantity: 0

15. Quantity of covalent bond units: 1

Properties and stability

Low toxicity. Operators should wear protective equipment to avoid contact with skin.

Storage method

This product should be sealed and stored away from light.

Plastic bag lined inside and woven bag packed outside. Store in a cool, ventilated, dry place, protected from sun and moisture, and away from fire and heat sources. When transporting, load and unload gently to avoid damage to the packaging.

Synthesis method

Heat and stir guanidine nitrate in sodium methoxide (or 50% NaOH) solution. After refluxing for half an hour, add methyl cyanoacetate dropwise and reflux for 2 hours. After the reaction is completed, heat and recover methanol. Heat water in the residue to dissolve it. When the temperature reaches 80°C, add acetic acid to adjust pH = 8 to precipitate product crystals. Cool to below 20°C, filter, wash and dry to obtain.

Purpose

For detection of nitrates and nitrites. Organic Synthesis. Pharmaceutical intermediates. It is used in the production of the drug Oncin-M, the antihypertensive drug Minadridine, and the anti-anemia drug folic acid.