titanium dioxide NEW

Store in a cool, ventilated warehouse. The package is sealed. Do not store and transport together with acids.

1. It can be dissolved in concentrated sulfuric acid and hydrofluoric acid only by boiling for a long time. It reacts with molten sodium hydroxide to generate titanate. At high temperature, it can be reduced to low-valent titanium compounds by hydrogen, carbon, metal sodium, etc., and react with carbon disulfide to form titanium disulfide. The refractive index of titanium dioxide is the largest among white pigments, the rutile type is 870, and the anatase type is 255. Since both anatase and brookite titanium dioxide transform into rutile at high temperature, the melting and boiling points of brookite and anatase titanium dioxide actually do not exist. Only rutile titanium dioxide has a melting point and a boiling point. The melting point of rutile titanium dioxide is 1850°C, the melting point in air is (1830±15)°C, and the melting point in oxygen-rich environment is 1879°C. The melting point is related to the purity of titanium dioxide. The boiling point of rutile titanium dioxide is (3200±300) K, and titanium dioxide is slightly volatile at this high temperature.

1. Molar refractive index: no available

2. Molar volume (cm 3 /mol): no available

3. Isotonic specific volume (90.2K): no available

4. Surface tension (dyne/cm): no available

5. Dielectric constant: no available

6. Polarizability (10 -24 cm 3 ): no available

7. Monoisotope mass: 79.937776 Da

8. Nominal mass: 80 Da

9. Average mass: 79.8658 Da

1. Hydrophobic parameter calculation reference value (XlogP): None

2. Number of hydrogen bond donors: 0

3. Number of hydrogen bond acceptors: 2

4. Number of rotatable chemical bonds: 0

5. Number of tautomers: None

6. Topological molecular polar surface area 34.1

7. Number of heavy atoms: 3

8. Surface charge: 0

9. Complexity: 18.3

10. Number of isotope atoms: 0

11. Determine the number of stereocenters: 0

12. Uncertain number of atomic stereocenters: 0

13. Determine the number of stereocenters of chemical bonds: 0

14. Uncertain number of chemical bond stereocenters: 0

15. Number of covalent bond units: 1

1. Physical data

1. Properties: white amorphous powder (turns brown at high temperature), odorless and tasteless.

2. Density (g/mL, 25/4°C): 3.84

3. Relative vapor density (g/mL, air=1): 4.26

4. Melting point (°C): 1857

5. Boiling point (ºC, 0.67kpa or 5 mmHg): 2900

6. Refractive index: 2.52

7. Flash point (ºC): Not sure

8. Specific rotation (°C): not sure

9. The autoignition point or ignition temperature (ºC) is uncertain

10. Vapor pressure (kPa, 25ºC): uncertain

11. Saturation vapor pressure (kPa, 60ºC): not sure

12. Heat of combustion (KJ/mol): not sure

13. Critical temperature (ºC): not sure

14. Critical pressure (KPa): uncertain

15. The log value of the oil-water (octanol/water) partition coefficient: not sure

16. Upper limit of explosion (%, V/V): not sure

17. Lower explosion limit (%, V/V): uncertain

18. Solubility: slowly soluble in hydrofluoric acid and concentrated sulfuric acid, insoluble in water, hydrochloric acid, dilute sulfuric acid and ethanol and other organic solvents.

19. Relative density (20ºC/4ºC): 4.26 (R type)

20. Melting point (°C): 1830-1850 (R type)

21. Refractive index: 2.72 (R type)