Melting point :285 °C (dec.)(lit.)
Boiling point :285 °C
Density :0.972
storage temp. :room temp
solubility :H₂O: clarity passes test
pka :7.69, 7.9, 1.3(at 25℃)
form :Shiny Powder
color :White
Odor :Odorless
PH Range :Yellow (6.8) to red (8.4)
Water Solubility :soluble
λmax :423nm, 557nm
ε(extinction coefficient) :≥19000 at 422-426nm in methanol
≥900 at 256-269nm in methanol Merck :14,7247
BRN :6260026
Stability :Stable. Incompatible with strong oxidizing agents.
Major Application :Sensor, optical device, paints, sterilization process, fertilizer, detecting viable cells, gastrointestinal mucosa, antibacterial agent, drugs, pharmacology
InChI :1S/C19H14O5S.Na/c20-15-9-5-13(6-10-15)19(14-7-11-16(21)12-8-14)17-3-1-2-4-18(17)25(22,23)24-19;/h1-12,20-21H;/q;+1/p-1
InChIKey :HKHYOKBQJILTEI-UHFFFAOYSA-M
SMILES :[Na+].Oc1ccc(cc1)C2(OS(=O)(=O)c3ccccc23)c4ccc([O-])cc4
CAS DataBase Reference :34487-61-1(CAS DataBase Reference)
EPA Substance Registry System :Phenol, 4,4'-(1,1-dioxido-3H-2,1-benzoxathiol-3-ylidene)bis-, monosodium salt (34487-61-1)

Symbol(GHS):
Signal word:	Warning
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 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. P264 Wash hands thoroughly after handling. P264 Wash skin thouroughly after handling. 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.