structural formula

business number	02a9
molecular formula	c6h8o4
molecular weight	144.13
label	3,6-dimethyl-1,4-dioxane-2,5-dione, lactide, 3,6-dimethyl-1,4-dioxane-2,5-dione, dl-dilactide, lactide

• 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:95-96-5

mdl number:mfcd00011685

einecs number:202-468-3

rtecs number:jh1100000

brn number:82121

pubchem number:24858300

physical property data

1. characteristics: undetermined

2. density (g/ml, 25℃): undetermined

3. relative vapor density (g/ml, air=1 ): undetermined

4. melting point (ºc): 116-119

5. boiling point (ºc, normal pressure): undetermined

6. boiling point (ºc, 8mmhg): 142

7. refractive index: undetermined

8. flash point (ºc): 180

9. specific rotation ( º): undetermined

10. autoignition point or ignition temperature (ºc): undetermined

11. vapor pressure (mmhg, ºc): undetermined

12. saturated vapor pressure (kpa, ºc): undetermined

13. heat of combustion (kj/mol): undetermined

14. critical temperature (ºc): undetermined determined

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: undetermined

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toxicological data

1. other multiple dose toxicity: oral tdlo for dogs: 35mg/kg/2w-i; oral tdlo for dogs: 9100mg/kg/13w-i;

ecological data

none yet

molecular structure data

1. molar refractive index: 31.20

2. molar volume (cm³/mol): 125.0

3. isotonic specific volume (90.2k ): 282.4

4. surface tension (dyne/cm): 26.0

5. polarizability (10-24cm3): 12.37

compute chemical data

1. reference value for hydrophobic parameter calculation (xlogp): 0.6

2. number of hydrogen bond donors: 0

3. number of hydrogen bond acceptors: 4

4. number of rotatable chemical bonds: 0

5. number of tautomers: 3

6. topological molecule polar surface area 52.6

7. number of heavy atoms: 10

8. surface charge: 0

9. complexity: 155

10. number of isotope atoms: 0

11. determine the number of atomic stereocenters: 0

12. uncertain number of atomic stereocenters: 2

13. determine chemical bonds.number of stereocenters: 0

14. number of uncertain chemical bond stereocenters: 0

15. number of covalent bond units: 1

properties and stability

none yet

storage method

none yet

synthesis method

using d,l-lactic acid as raw material, d,l-lactide is synthesized through dehydration cyclization in the presence of a catalyst. the crude product was purified by recrystallization to prepare high-yield, high-purity d,l-lactide.

purpose

mainly used in medicine.

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