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21-3140

Sigma-Aldrich

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

JIS special grade

Synonym(s):

3-Hydroxy-4-nitroso-2,7-naphthalenedisulfonic acid disodium salt, Nitroso-R salt, Nitroso-R-salt

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About This Item

Linear Formula:
ONC10H4(OH)(SO3Na)2 · xH2O
CAS Number:
525-05-3
Molecular Weight:
377.26 (anhydrous basis)
Beilstein:
3643930
EC Number:
208-369-1
MDL number:
MFCD00149246
UNSPSC Code:
12352300
PubChem Substance ID:
329752139

grade

JIS special grade

form

powder

availability

available only in Japan

mp

>300 °C (lit.)

SMILES string

O.[Na+].[Na+].Oc1c(cc2cc(ccc2c1N=O)S([O-])(=O)=O)S([O-])(=O)=O

InChI

1S/C10H7NO8S2.2Na.H2O/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);;;1H2/q;2*+1;/p-2

InChI key

RDFCJJHALFWNIG-UHFFFAOYSA-L

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Storage Class Code

11 - Combustible Solids

WGK

WGK 3

Flash Point(F)

Not applicable

Flash Point(C)

Not applicable

Personal Protective Equipment

dust mask type N95 (US), Eyeshields, Gloves

Certificates of Analysis (COA)

Search for Certificates of Analysis (COA) by entering the products Lot/Batch Number. Lot and Batch Numbers can be found on a product’s label following the words ‘Lot’ or ‘Batch’.

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Jacob P Thyssen et al.
Contact dermatitis, 63(2), 63-69 (2010-06-25)
It is often difficult to establish clinical relevance of metal exposure in cobalt-allergic patients. Dermatologists and patients may incorrectly assume that many metallic items release cobalt at levels that may cause cobalt dermatitis. Cobalt-allergic patients may be unaware that they
Erdal Kendüzler et al.
Annali di chimica, 95(1-2), 77-85 (2005-04-02)
A procedure for the determination of trace amount of cadmium after adsorption of its 1-nitroso-2-naphthol-3,6-disulfonic acid chelate on Ambersorb 572 has been proposed. This chelate is adsorbed on the adsorbent in the pH range 3-8 from large volumes of aqueous
M Hoshi et al.
Radioisotopes, 34(4), 201-206 (1985-04-01)
A substoichiometric extraction method with nitroso-R salt (NRS) has been studied for the determination of trace Co in crud. The Co-NRS complex is extracted substoichiometrically into Capriquat-CHCl3 at pH 6.5-9.0 in 20 min of shaking time. The analytical results obtained
M Callens et al.
The Biochemical journal, 250(1), 285-290 (1988-02-15)
The binding of two activating cations, Co2+ and Mg2+, and of one inhibitory cation, Ca2+, to D-xylose isomerase from Streptomyces violaceoruber was investigated. Equilibrium-dialysis and spectrometric studies revealed that the enzyme binds 2 mol of Co2+/mol of monomer. Difference absorption
J Miura et al.
The Analyst, 115(9), 1191-1195 (1990-09-01)
The solid ion-pair material produced from the reaction between benzyldimethyltetradecylammonium chloride (BDTA) and sodium perchlorate on naphthalene provides the basis for a simple, rapid and selective technique for pre-concentrating iron from up to 500 ml of aqueous solution. Iron reacts

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