Saccharin

From Crystal growing
Jump to: navigation, search


  Saccharin   
Names: saccharin
glucide
orto-sulfobenzoic acid imide
2-sulfobenzoic acid imide
orto-sulfobenzoimide

Formula: C7H5NO3S
SMILES: C1=CC=C2C(=C1)C(=O)NS2(=O)=O
Molar mass: 183.186 g/mol
Density: 0.828 g/cm3
Crystal system: monoclinic
a=9.55 Å
9.5500 Å
0.9550 nm
, b=6.91 Å
6.9100 Å
0.6910 nm
, c=11.8 Å
11.8000 Å
1.1800 nm
α=90°
90°  
, β=103.9°
103°54′  
, γ=90°
90°  

Shapes:
https://media.crystalls.info/w/uploads/media/Beveled_tetragonal_prism.json
https://media.crystalls.info/w/uploads/media/Prolongated_tetragonal_pyramidal_prism.json

Color: colorless
Melting point: 228.8 °C
501.95 K
443.84 °F
903.51 °R

Optical properties: birefringence
Toxicity: non-toxic
LD50=17000mg/kg

Description

Organic compound, monobasic acid. Doesn`t form water hydrates.

Precursors

Reaction between sodium saccharinate and sulfuric acid or hydrochloric acid

Chemical equation:

2C7H4NaNO3S + H2SO4 = 2C7H5NO3S↓ + Na2SO4
C7H4NaNO3S + HCl = C7H5NO3S↓ + NaCl

For preparation of 100.00g of saccharin а 112.00g of sodium saccharinate and 72.35g of 37% sulfuric acid or 52.38g of 38% hydrochloric acid is required.
Add to the flask with sodium saccharinate solution small parts of acid solution and stir. The large amount of poorly soluble precipitate will form. Settle it out and wash it from soluble impurities few times. Filter precipitate and wash it wish small amount of diethyl ether or DMSO, then filter the solution and use it for crystal growing.

Storage conditions

Store in its original form or under several layers of varnish at average humidity and room temperature. Do not store in matchboxes or cotton wool and do not heat.

Solubility

Temperatureгр/100,00 гр waterгр/100,00 гр ethanolгр/100,00 гр acetoneгр/100,00 гр glycerolгр/100,00 гр trichlorethylene
0°C
273.15 K
32 °F
491.67 °R
7.69
7.69 g/100g
7.141 %
15°C
288.15 K
59 °F
518.67 °R
0.012
0.012 g/100g
0.012 %
20°C
293.15 K
68 °F
527.67 °R
0.34
0.34 g/100g
0.339 %
3.22
3.22 g/100g
3.12 %
2
2 g/100g
1.961 %
25°C
298.15 K
77 °F
536.67 °R
0.43
0.43 g/100g
0.428 %
30°C
303.15 K
86 °F
545.67 °R
~0.67
0.67 g/100g
0.666 %
40°C
313.15 K
104 °F
563.67 °R
~1.15
1.15 g/100g
1.137 %
50°C
323.15 K
122 °F
581.67 °R
~1.63
1.63 g/100g
1.604 %
16.8
16.8 g/100g
14.384 %
60°C
333.15 K
140 °F
599.67 °R
~2.10
2.1 g/100g
2.057 %
70°C
343.15 K
158 °F
617.67 °R
~2.58
2.58 g/100g
2.515 %
80°C
353.15 K
176 °F
635.67 °R
~3.05
3.05 g/100g
2.96 %
90°C
363.15 K
194 °F
653.67 °R
~3.53
3.53 g/100g
3.41 %
100°C
373.15 K
212 °F
671.67 °R
4
4 g/100g
3.846 %
Highly soluble in isopropanol. Soluble in xylol, benzene, ethyl acetate and amyl acetate. Slightly soluble in diethyl ether and DMSO.

Gallery


Sources


Navigation