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5-Sulfosalicylic acid dihydrate

Product Name5-Sulfosalicylic acid dihydrate
CAS5965-83-3
MFC7H10O8S
MW254.21
EINECS641-618-6
MOL File5965-83-3.mol

Chemical Properties

Melting point	105-110 °C(lit.)
Boiling point	100 °C
Density	0,8 g/cm³
bulk density	310kg/m3
vapor density	0.62 (vs air)
vapor pressure	<1 hPa (20 °C)
Flash point	150°C
storage temp.	Store below +30°C.
solubility	H₂O: 1 M at 20 °C, clear, colorless
form	Powder
color	White
Odor	Odorless
PH	<0.5 (200g/l, H2O, 20℃)
Water Solubility	SOLUBLE
Sensitive	Light Sensitive
Merck	14,8964
BRN	650741
Stability	Stable, but light sensitive. Incompatible with strong oxidizing agents.
InChI	1S/C7H6O6S.2H2O/c8-6-2-1-4(14(11,12)13)3-5(6)7(9)10;;/h1-3,8H,(H,9,10)(H,11,12,13);2*1H2
InChIKey	BHDKTFQBRFWJKR-UHFFFAOYSA-N
SMILES	[H]O[H].[H]O[H].OC(=O)c1cc(ccc1O)S(O)(=O)=O
CAS DataBase Reference	5965-83-3(CAS DataBase Reference)
NIST Chemistry Reference	Benzoic acid, 2-hydroxy-5-sulfo-, dihydrate(5965-83-3)
EPA Substance Registry System	Benzoic acid, 2-hydroxy-5-sulfo-, dihydrate (5965-83-3)

Safety Information

Hazard Codes	Xn,C,Xi
Risk Statements	22-36/37/38-34
Safety Statements	26-45-36/37/39-36
RIDADR	UN 3261 8 / PGII
WGK Germany	3
RTECS	VO6500000
F	8
TSCA	Yes
HS Code	2918 29 00
HazardClass	8
Storage Class	8A - Combustible corrosive hazardous materials
Hazard Classifications	Eye Dam. 1 Skin Corr. 1B
Toxicity	LD50 orally in Rabbit: 1850 mg/kg

MSDS

Provider	Language
ACROS	English
SigmaAldrich	English

Usage And Synthesis

Chemical Properties

white crystalline powder

Uses

5-Sulfosalicylic acid dihydrate may be used in the preparation of 1:1 proton-transfer organic adduct, 3-aminopyridin-ium 3-carb-oxy-4-hydroxy-benzene-sulfonate monohydrate and the anhydrous adduct.

Uses

5-Sulfosalicylic Acid Dihydrate is for reducing and fixation of proteins in agarose and polyacrylamide gels.

General Description

5-Sulfosalicylic acid is a strong acid capable of protonating water. It forms a new theophylline complex, which was investigated by X-ray photoelectron spectroscopy (XPS). It forms 1:1 proton-transfer compounds with the ortho-substituted monocyclic heteroaromatic Lewis bases. Their crystal structures have been studied.

Synthesis

Nitration reaction: Salicylic acid is mixed with concentrated sulfuric acid and concentrated nitric acid, and the nitration reaction is carried out at low temperature to obtain nitrosalicylic acid. The reaction needs to be matched with conditions such as ice bath and slowly adding nitric acid to control the temperature and reaction rate.

Reducing denitrification: Nitrosalicylic acid is added to concentrated sulfuric acid and the nitro group is removed at high temperature to form 5-sulfosalicylic acid. A reducing agent (e.g., sodium sulfite) can be used in this step to facilitate the reaction.

Crystallization and purification: the desired 5-sulfosalicylic acid is extracted and purified from the reaction product by methods such as crystallization techniques or column chromatography.

Purification Methods

Crystallise the acid from H2O. Alternatively, it is converted to the monosodium salt which is crystallised from H2O and washed with a little H2O, EtOH and then Et2O. The acid is recovered by acidifying. The S-4-chlorobenzylisothiuronium salt has m 181o (from dioxane). [Beilstein 11 H 411, 11 II 232, 11 III 704.]

5-Sulfosalicylic acid dihydrate

Chemical Properties

Safety Information

MSDS

Usage And Synthesis

Preparation Products And Raw materials

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