Melting point :197 °C
Boiling point :294°C (rough estimate)
Density :1.2997 (rough estimate)
refractive index :1.6440 (estimate)
storage temp. :2-8°C
solubility :acetone: soluble50mg/mL
form :Crystalline Powder
pka :7.4, 2.65(at 25℃)
color :white to off-white
Water Solubility :150mg/100mL (29 ºC)
Merck :14,8905
BRN :261304
Stability :Stable, but light sensitive. Incompatible with strong oxidizing agents.
CAS DataBase Reference :57-68-1(CAS DataBase Reference)
NIST Chemistry Reference :Sulfamethazine(57-68-1)
IARC :3 (Vol. 79) 2001
EPA Substance Registry System :Sulfamethazine (57-68-1)

Symbol(GHS):
Signal word:	Danger
Hazard statements:	Code Hazard statements Hazard class Category Signal word Pictogram P-Codes H315 Causes skin irritation Skin corrosion/irritation Category 2 Warning P264, P280, P302+P352, P321,P332+P313, P362 H317 May cause an allergic skin reaction Sensitisation, Skin Category 1 Warning P261, P272, P280, P302+P352,P333+P313, P321, P363, P501 H319 Causes serious eye irritation Serious eye damage/eye irritation Category 2A Warning P264, P280, P305+P351+P338,P337+P313P H334 May cause allergy or asthma symptoms or breathing difficulties if inhaled Sensitisation, respiratory Category 1 Danger P261, P285, P304+P341, P342+P311,P501 H362 May cause harm to breast-fed children Reproductive toxicity, effects on or via lactation Additional category P201, P260, P263, P264, P270,P308+P313
Precautionary statements:	P201 Obtain special instructions before use. P260 Do not breathe dust/fume/gas/mist/vapours/spray. P261 Avoid breathing dust/fume/gas/mist/vapours/spray. P263 Avoid contact during pregnancy/while nursing. P264 Wash hands thoroughly after handling. P264 Wash skin thouroughly after handling. P270 Do not eat, drink or smoke when using this product. P272 Contaminated work clothing should not be allowed out of the workplace. P280 Wear protective gloves/protective clothing/eye protection/face protection. P285 In case of inadequate ventilation wear respiratory protection. P302+P352 IF ON SKIN: wash with plenty of soap and water. P304+P341 IF INHALED: If breathing is difficult, 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. P308+P313 IF exposed or concerned: Get medical advice/attention. P321 Specific treatment (see … on this label). P332+P313 IF SKIN irritation occurs: Get medical advice/attention. P333+P313 IF SKIN irritation or rash occurs: Get medical advice/attention. P342+P311 IF experiencing respiratory symptoms: call a POISON CENTER or doctor/physician. P362 Take off contaminated clothing and wash before reuse. P363 Wash contaminated clothing before reuse. P501 Dispose of contents/container to..…