1-Nitroso-2-naphthol-3,6-disulfonic acid disodium salt

Melting point :>300 °C(lit.)
solubility :Slightly soluble in methanol and ethanol.
form :Crystalline Powder
color :Yellow to orange
Water Solubility :almost transparency
Merck :14,6644
BRN :3643930
InChI :InChI=1S/C10H7NO8S2.Na.H/c12-10-8(21(17,18)19)4-5-3-6(20(14,15)16)1-2-7(5)9(10)11-13;;/h1-4,12H,(H,14,15,16)(H,17,18,19);;
InChIKey :YSJIUHZRNBXDKS-UHFFFAOYSA-N
SMILES :N(C1=C(C(S(O)(=O)=O)=CC2=CC(S(O)(=O)=O)=CC=C12)O)=O.[NaH]
CAS DataBase Reference :525-05-3(CAS DataBase Reference)
EPA Substance Registry System :2,7-Naphthalenedisulfonic acid, 3-hydroxy-4-nitroso-, disodium salt (525-05-3)

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 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. P264 Wash hands thoroughly after handling. P264 Wash skin thouroughly after handling. 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. 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. P405 Store locked up. P501 Dispose of contents/container to..…