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R4126

Sigma-Aldrich

Reinecke salt

Synonym(s):

Ammonium reineckate, Ammonium tetrarhodanatodiamminechromate(III), Ammonium tetrathiocyanatodiamminechromate(III), Ammonium tetrathiocyanodiammonochromate

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About This Item

Linear Formula:
NH4[Cr(NH3)2(SCN)4]
CAS Number:
13573-16-5
Molecular Weight:
336.43
EC Number:
237-003-3
MDL number:
MFCD00066638
UNSPSC Code:
12352302
PubChem Substance ID:
329824029
NACRES:
NA.21

form

powder

Quality Level

200

mp

268-272 °C (dec.) (lit.)

SMILES string

N.N.[NH4+].N#CS[Cr-](SC#N)(SC#N)SC#N

InChI

1S/4CHNS.Cr.3H3N/c4*2-1-3;;;;/h4*3H;;3*1H3/q;;;;+3;;;/p-3

InChI key

ZGLIQORZYPZFPW-UHFFFAOYSA-K

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Application

Reinecke salt can be used as a precipitation reagent for the precipitation of basic compounds such as amines, amino acids, and alkaloids as their reineckate complexes. It is also used in the spectrophotometric determination of promazine along with alizarin S by the formation of the promazine ion-association complex.

Pictograms

Exclamation mark
GHS07

Signal Word

Warning

Hazard Statements

H302 + H312 + H332

Hazard Classifications

Acute Tox. 4 Dermal - Acute Tox. 4 Inhalation - Acute Tox. 4 Oral

Storage Class Code

11 - Combustible Solids

WGK

WGK 3

Flash Point(F)

Not applicable

Flash Point(C)

Not applicable

Certificates of Analysis (COA)

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H Puzanowska-Tarasiewicz et al.
Journal of pharmaceutical and biomedical analysis, 26(1), 1-5 (2001-07-14)
Reinecke salt and alizarin S have been tested as reagents for the determination of promazine. They react in neutral and acidic media with promazine forming a reddish and brown crystalline compounds. The compounds are sparingly soluble in water but fairly
X F Sun et al.
Analytical biochemistry, 167(2), 304-311 (1987-12-01)
A method to permit isolation and measurement of trimethylselenonium ion [TMSe, (CH3)3Se+] from 1 liter of human urine was developed. The method was based on precipitation of TMSe with ammonium reineckate, preseparation with anion-exchange resin, and final thermal decomposition and
Qualitative and quantitative analysis of quaternary ammonium alkaloids from Rhizoma Corydalis by matrix-assisted laser desorption/ionization Fourier transform mass spectrometry coupled with a selective precipitation reaction using Reinecke salt.
Cheng ZH, et al.
Analytica Chimica Acta, 555(2), 269-277 (2006)
S Khalil
Journal of pharmaceutical and biomedical analysis, 21(4), 697-702 (2000-03-04)
Ion-associate complexes of ephedrine HCl (I), cinchonine HCl (II), chlorpheniramine maleate (III), atropine sulphate (IV) and diphenhydramine HCl (V) with ammonium reineckate were precipitated and their solubilities were studied as a function of pH, ionic strength and temperature. Saturated solutions
Gamal H Ragab et al.
Spectrochimica acta. Part A, Molecular and biomolecular spectroscopy, 60(4), 973-978 (2004-03-24)
Three accurate, rapid and simple atomic absorption spectrometric, conductometric and colorimetric methods were developed for the determination of norfloxacin (NRF), ciprofloxacin (CIP), ofloxacin (OFL) and enrofloxacin (ENF). The proposed methods depend upon the reaction of ammonium reineckate with the studied
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