Melting point :227 °C (dec.)(lit.)
Boiling point :468.2±45.0 °C(Predicted)
Density :1.358 (estimate)
refractive index :1.6000 (estimate)
storage temp. :Keep in dark place,Inert atmosphere,Room temperature
solubility :1 M HCl: soluble
form :Powder
pka :2.1(at 35℃)
color :White
Water Solubility :Soluble in dilute acid and alkali solution, highly soluble in water, not soluble in alcohol.
Merck :14,2782
BRN :1728095
LogP :-4.340 (est)
CAS DataBase Reference :923-32-0(CAS DataBase Reference)
NIST Chemistry Reference :Dl-cystine(923-32-0)

Symbol(GHS):
Signal word:	Warning
Hazard statements:	Code Hazard statements Hazard class Category Signal word Pictogram P-Codes H302 Harmful if swallowed Acute toxicity,oral Category 4 Warning P264, P270, P301+P312, P330, P501 H315 Causes skin irritation Skin corrosion/irritation Category 2 Warning P264, P280, P302+P352, P321,P332+P313, P362 H319 Causes serious eye irritation Serious eye damage/eye irritation Category 2A Warning P264, P280, P305+P351+P338,P337+P313P H335 May cause respiratory irritation Specific target organ toxicity, single exposure;Respiratory tract irritation Category 3 Warning
Precautionary statements:	P261 Avoid breathing dust/fume/gas/mist/vapours/spray. P270 Do not eat, drink or smoke when using this product. P271 Use only outdoors or in a well-ventilated area. P280 Wear protective gloves/protective clothing/eye protection/face protection. P302+P352 IF ON SKIN: wash with plenty of soap and water. P304+P340 IF INHALED: Remove victim to fresh air and Keep at rest in a position comfortable for breathing. P305+P351+P338 IF IN EYES: Rinse cautiously with water for several minutes. Remove contact lenses, if present and easy to do. Continuerinsing. P312 Call a POISON CENTER or doctor/physician if you feel unwell. P330 Rinse mouth. P403+P233 Store in a well-ventilated place. Keep container tightly closed.