| HD
INDIGO CARMINE SUPRA |
REF
: IS - 1698 - 1994 |
| |
|
|
| Common
name |
: |
Indigo
Carmine |
| Synonyms |
: |
F.
D. & C. Blue No. 2 |
| |
: |
C.
I. Food Blue 1 |
| Colour
Index Number (1971) |
: |
73015 |
| Indian
Standards Specification |
: |
IS
1698 - 1974 |
| Solubility
in water at 300C |
: |
1.5%
(approx.) |
| Fastness
properties |
|
|
| Light |
: |
Fair |
| Preservatives |
|
|
| Benzoic
Acid |
: |
Poor |
| Sulphur
Dioxide |
: |
Poor |
| Heat
(2200F., 1050C.) |
: |
Fair |
| Baking
(4000F., 2050C.) |
: |
Poor |
| Fruit
Acids (Citric & Tartaric) |
: |
Fair |
| Alkalies |
: |
Poor |
|
 |
| |
|
Nos.: Characteristics: |
Requirements: |
| |
|
1. Total
dye content, corrected for sample dried at
105° ±
1°C for 2 hours, percent by mass. |
Min.
85 |
| |
|
2. Volatile
matter at 135°C and chloride and sulphate
expressed as sodium
salt, percent by mass. |
Max.
15 |
| |
|
| 3. Water
insoluable matter, percent by mass. |
Max.
0.4 |
| |
|
| 4. Combined
either extracts, percent by mass. |
Max.
0.4 |
| |
|
| 5.
Subsidiary dyes, percent by mass. |
Max.
3 |
| |
|
| METALS: |
|
| |
|
| 6. Lead,
mg./kg. |
Max.
10 |
| |
|
| 7. Arsenic,
mg./kg. |
Max.
3 |
| |
|
| 8. Heavy
Metals, mg./kg. |
Less
than 40 |
| |
|
| 9. Isatin
5-Sulphonic acid, percent by mass |
Max
1 |
| |
|
|
