2,4-di-tert-butylphenol

2,4-di-tert-butylphenol structural formula

Structural formula

Business number 02BF
Molecular formula C14H22O
Molecular weight 206.33
label

None

Numbering system

CAS number:96-76-4

MDL number:MFCD00008828

EINECS number:202-532-0

RTECS number:SK8260000

BRN number:1910383

PubChem number:24861534

Physical property data

1. Properties: Brown-yellow solid.

2. Density (g/mL, 20?): 0.887

3. Solid phase standard combustion heat (enthalpy) (kJ·mol-1 ): -8269.89

4. Melting point (ºC): 56

5. Boiling point (ºC, normal pressure): 264

6. Solid state standard claims heat (Enthalpy) (kJ·mol-1): -383.4

7. Refractive index at room temperature (n20): 1.5080

8. Flash point (ºC): 115

9. Gas phase standard combustion heat (enthalpy) (kJ·mol-1): -8356.60

10. Gas phase standard claims heat (enthalpy) (kJ·mol-1): -296.7

11. Vapor pressure (mmHg, 84.5ºC): 1

12. Saturated vapor pressure (kPa, ºC): 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: Soluble in methanol and ether, very slightly soluble in water.

Toxicological data

Acute toxicity: mouse peritoneal cavity LD50: 25mg/kg; mouse intravenous injection LD50: 100mg/kg;

Ecological data

This substance is slightly hazardous to water.

Molecular structure data

1. Molar refractive index: 64.90

2. Molar volume (cm3/mol): 221.2

3. Isotonic specific volume (90.2K ): 518.3

4. Surface tension (dyne/cm): 30.1

5. Polarizability (10-24cm3): 25.73

Compute chemical data

1. Reference value for hydrophobic parameter calculation (XlogP): 4.9

2. Number of hydrogen bond donors: 1

3. Number of hydrogen bond acceptors: 1

4. Number of rotatable chemical bonds: 2

5. Number of tautomers: 3

6. Topological molecule polar surface area 20.2

7. Number of heavy atoms: 15

8. Surface charge: 0

9. Complexity: 206

10. Number of isotope atoms: 0

11. Determine the number of atomic stereocenters: 0

12. Uncertain number of atomic stereocenters: 0

13. Determine the number of chemical bond stereocenters: 0

14. Number of uncertain chemical bond stereocenters: 0

15. Number of covalent bond units: 1

Properties and Stability

Avoid contact with oxides.

Storage method

Store in a cool, ventilated warehouse. Keep away from fire. Keep container tightly sealed. should be kept away from oxidizer, do not store together. Equipped with the appropriate variety and quantity of fire equipment. Suitable materials should be available in the storage area to contain spills.

Synthesis method

It is derived from the alkylation reaction of phenol and isobutylene.

Purpose

It can be used as an intermediate for antioxidants, stabilizers and ultraviolet absorbers.

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2,4-diamino-6-hydroxypyrimidine

2,4-diamino-6-hydroxypyrimidine structural formula

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.

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2,5-Dimethoxybenzaldehyde

2,5-Dimethoxybenzaldehyde Structural Formula

Structural formula

Business number 025L
Molecular formula C9H10O3
Molecular weight 166.17
label

2,5-dimethoxybenzoin aldehyde,

2,5-Dimethoxy-benzaldehyde

Numbering system

CAS number:93-02-7

MDL number:MFCD00003314

EINECS number:202-211-5

RTECS number:CU5740500

BRN number:509301

PubChem number:24893408

Physical property data

1. Characteristics: light yellow crystalline powder


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


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


4. Melting point (ºC): 45-50


5. Boiling point (ºC,Normal pressure):146


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


7. Refractive index: undetermined


8. Flashpoint (ºC): Undetermined


9. Specific optical 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. Oil and water (octanol/Log value of partition coefficient (water): undetermined


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


18. Lower explosion limit (%,V/V): Undetermined


19. Solubility: soluble in ethanol, ether and other organic solvents.

Toxicological data

None

Ecological data

None

Molecular structure data

1. Molar refractive index: 46.36


2. Molar Volume (m3/mol??149.1


3. isotonic specific volume (90.2K):365.6


4. Surface Tension (dyne/cm):36.1


5. Polarizability?10-24cm3):18.37

Compute chemical data

1 , Reference value for hydrophobic parameter calculation (XlogP): 1.5


2 , Number of hydrogen bond donors: 0


3 , Number of hydrogen bond acceptors: 3


4? Number of rotatable chemical bonds: 3


5 , Number of tautomers:


6? Topological molecular polar surface area ( TPSA): 35.5


7 , Number of heavy atoms: 12


8 , Surface charge: 0


9 , Complexity: 147


10 , Isotope atomic number: 0


11, Determine the number of atomic 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


Properties and stability

None

Storage method

This product should be sealed and stored away from light.

Synthesis method

Using the corresponding hydroxymethoxybenzaldehyde as raw material, it is prepared by methylation reaction with dimethyl sulfate in an alkali aqueous solution.

Purpose

Used as organic intermediates

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