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CAS RN: 846-70-8 | Product Number: F0100

Naphthol Yellow S Hydrate

Purity: >98.0%(T)(HPLC)
  • 2,4-Dinitro-1-naphthol-7-sulfonic Acid Disodium Salt Hydrate
  • Disodium 2,4-Dinitro-1-naphthol-7-sulfonate Hydrate
  • Disodium 8-Hydroxy-5,7-dinitro-2-naphthalenesulfonate Hydrate
  • 8-Hydroxy-5,7-dinitro-2-naphthalenesulfonic Acid Disodium Salt Hydrate
  • Flavianic Acid Disodium Salt Hydrate
  • Acid Yellow 1 Hydrate
1   5  

*Stock available in Belgium will be delivered in 1 to 3 days
*Stock available in Japan will be delivered in 1 to 2 weeks (excludes regulated items and dry ice shipments).

Product Number F0100
Purity / Analysis Method >98.0%(T)(HPLC)
Molecular Formula / Molecular Weight C__1__0H__4N__2Na__2O__8S·xH__2O = 358.19  
Physical State (20 deg.C) Solid
CAS RN 846-70-8
Reaxys Registry Number 3839220
PubChem Substance ID 87569899
Merck Index (14) 6393
Colour Index 10316
MDL Number


Appearance Light yellow to Brown powder to crystal
Purity(HPLC) min. 98.0 area%
Purity(Nonaqueous Titration) min. 98.0 %(calcd.on anh.substance)
Lambda max. 427.0 to 431.0 nm(H2O)
Lambda max.2 390.0 to 394.0 nm(H2O)
Absorbance(E1%1cm) min. 430(H2O, 427.0 to 431.0 nm)
Absorbance(E1%1cm)2 min. 420(H2O, 390.0 to 394.0 nm)
Water max. 8.0 %
Properties (reference)
Maximum Absorption Wavelength 429(H2O) nm
Solubility in water Soluble
Solubility (miscible with) Sulphuric acid
Solubility (slightly sol. in) Ethanol
Pictogram Pictogram
Signal Word Warning
Hazard Statements H317 : May cause an allergic skin reaction.
Precautionary Statements P501 : Dispose of contents/ container to an approved waste disposal plant.
P261 : Avoid breathing dust/ fume/ gas/ mist/ vapours/ spray.
P272 : Contaminated work clothing should not be allowed out of the workplace.
P280 : Wear protective gloves.
P362 + P364 : Take off contaminated clothing and wash it before reuse.
P333 + P313 : If skin irritation or rash occurs: Get medical advice/ attention.
Related Laws:
EC Number 212-690-2
RTECS# QK1813000
Transport Information:
HS Number 3204120090
PubMed Literature

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