Melting point :166 °C
Boiling point :482℃
Density :1.3915 (rough estimate)
refractive index :1.6630 (estimate)
Flash point :>110°(230°F)
storage temp. :Keep in dark place,Inert atmosphere,Room temperature
solubility :Practically insoluble in water, freely soluble in acetone, sparingly soluble in ethanol (96 per cent). It dissolves in dilute solutions of sodium hydroxide and in dilute acids.
pka :pKa 5.60±0.05 (Uncertain)
form :Solid
color :White to Pale Yellow
Water Solubility :Soluble in ethanol or acetone. Very slightly soluble in water
Sensitive :Light Sensitive
Merck :14,8918
BRN :6732984
BCS Class :2,4
Stability :Stable, but light sensitive. Incompatible with strong oxidizing agents.
InChIKey :JLKIGFTWXXRPMT-UHFFFAOYSA-N
CAS DataBase Reference :723-46-6(CAS DataBase Reference)
IARC :3 (Vol. Sup 7, 79) 2001
NIST Chemistry Reference :Sulfanilamide, n1-(5-methyl-3-isoxazolyl)-(723-46-6)
EPA Substance Registry System :Sulfamethoxazole (723-46-6)

Symbol(GHS):
Signal word:	Warning
Hazard statements:	Code Hazard statements Hazard class Category Signal word Pictogram P-Codes H317 May cause an allergic skin reaction Sensitisation, Skin Category 1 Warning P261, P272, P280, P302+P352,P333+P313, P321, P363, P501
Precautionary statements:	P201 Obtain special instructions before use. P280 Wear protective gloves/protective clothing/eye protection/face protection. P302+P352 IF ON SKIN: wash with plenty of soap and water. P308+P313 IF exposed or concerned: Get medical advice/attention.