structural formula

business number	0182
molecular formula	c7h14n2o4s
molecular weight	222.26
label	(r)-s-(2-amino-2-carboxyethyl)-l-cysteine, (r)-s-(2-amino-2-carboxyethyl)-l-homocysteine

• 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:56-88-2

mdl number:mfcd00036685

einecs number:200-295-8

rtecs number:none

brn number:2505200

pubchem number:24892965

physical property data

1. character: crystal.

2. density (g/ml,25/4℃) ： undetermined

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

4. melting point (ºc): 240 ～250℃（262~263℃).

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

6. boiling point (ºc,5.2kpa): undetermined

7. refractive index: not ok

8. flashpoint (ºc): undetermined

9. specific optical rotation ( º): undetermined

10. spontaneous ignition point or ignition combustion temperature (ºc): not ok

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 /water) partition coefficient pair value: undetermined

17. explosion limit (%,v/v): undetermined

18. lower explosion limit (%,v/v): not ok

19. solubility: not available sure.

toxicological data

none yet

ecological data

none yet

molecular structure data

5. molecular property data:

1. molar refractive index: 52.59

2. molar volume (m³/mol）：155.4

3. isotonic specific volume (90.2k):457.7

4. surface tension (dyne/cm):75.2

5. polarizability（10^-24cm³): 20.84

compute chemical data

1. reference value for hydrophobic parameter calculation (xlogp): -6

2. number of hydrogen bond donors: 4

3. number of hydrogen bond acceptors: 6

4. number of rotatable chemical bonds: 7

5. number of tautomers:

6. topological molecular polar surface area (tpsa):127

7. number of heavy atoms: 14

8. surface charge: 0

9. complexity: 212

10. number of isotope atoms: 0

11. determine the number of atomic stereocenters: 2

12. the number of uncertain 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 yet

storage method

this product should be kept sealed.

synthesis method

generated by the interaction of o-succinyl homoserine and cysteine. cystathionine is cystathionine beta–lyase removes pyruvate and nh3generates homocysteine.

purpose

for biochemical research.

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