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EINECS 206-486-2
CAS No. 349-46-2 Density 1.571 g/cm3
Solubility 0.057 g/L (25 ºC) Melting Point 265 °C (dec.)(lit.)
Formula C6H12N2O4S2 Boiling Point 468.2 °C at 760 mmHg
Molecular Weight 240.30 Flash Point 237 °C
Transport Information Appearance white crystals or crystalline powder
Safety 22-24/25-36/37/39-26 Risk Codes 22-36/37/38
Molecular Structure Molecular Structure of 349-46-2 (D-Cystine) Hazard Symbols HarmfulXn; IrritantXi

Cystine, D- (8CI);(S)-Cystine;D(+)-3,3'-Dithiobis(2-aminopropanoic acid);(2S,2'S)-3,3'-Disulfanediylbis(2-aminopropanoic acid);


D-Cystine Specification

The systematic name of this chemical is D-Cystine. With the CAS registry number 349-46-2 and EINECS registry number 206-486-2, it is also named as D(+)-3,3'-dithiobis(2-aminopropanoic acid). In addition, the molecular formula is C6H12N2O4S2 and the molecular weight is 240.30. It is a kind of white crystals and should be stored in a cool and dry place.

Physical properties about D-Cystine are: (1)ACD/LogP: 1.23; (2)# of Rule of 5 Violations: 1; (3)ACD/LogD (pH 5.5): -1.28; (4)ACD/LogD (pH 7.4): -1.4; (5)ACD/BCF (pH 5.5): 1; (6)ACD/BCF (pH 7.4): 1; (7)ACD/KOC (pH 5.5): 1; (8)ACD/KOC (pH 7.4): 1; (9)#H bond acceptors: 6; (10)#H bond donors: 6; (11)#Freely Rotating Bonds: 9; (12)Polar Surface Area: 109.68 Å2; (13)Index of Refraction: 1.652; (14)Molar Refractivity: 55.95 cm3; (15)Molar Volume: 152.8 cm3; (16)Polarizability: 22.18 ×10-24cm3; (17)Surface Tension: 88.2 dyne/cm; (18)Density: 1.571 g/cm3; (19)Flash Point: 237 °C; (20)Enthalpy of Vaporization: 80.02 kJ/mol; (21)Boiling Point: 468.2 °C at 760 mmHg; (22)Vapour Pressure: 4.62E-10 mmHg at 25°C.

When you are using this chemical, please be cautious about it as the following:
This chemical is irritating to eyes, respiratory system and skin. And it is harmful if swallowed. During using it, wear suitable protective clothing, gloves and eye/face protection and avoid contact with skin and eyes. In case of contact with eyes, rinse immediately with plenty of water and seek medical advice. In addition, you should not breathe dust.

You can still convert the following datas into molecular structure:
(2)Std.InChI: InChI=1S/C6H12N2O4S2/c7-3(5(9)10)1-13-14-2-4(8)6(11)12/h3-4H,1-2,7-8H2,(H,9,10)(H,11,12)/t3-,4-/m1/s1

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