Caramel Colour
Class I is made with heat alone and is the mildest; Class IV uses sulphite and ammonia and is the cola standard.
Key Specifications
| CAS number | 8028-89-5 |
|---|---|
| E numbers | E150a / b / c / d |
| Classes | I plain / II caustic sulphite / III ammonia / IV sulphite ammonia |
| Colour strength | 0.1-0.6 (EBC or absorbance) |
| Form | Liquid / powder |
| pH | 2.5-5.0 by class |
Four classes with different chemistry and legal limits
Class I is made with heat alone and is the mildest; Class IV uses sulphite and ammonia and is the cola standard. The classes are not interchangeable legally, because several markets cap Class III and IV specifically.
Colour strength and stability
Strength is specified in colour units, and the same visual shade needs different doses by class. Class IV holds colour best in acid and is stable in soft drinks over shelf life.
Typical Applications
- Cola and soft drinks — Class IV at 0.1-0.3 percent for the characteristic brown.
- Sauces and gravies — Class I or II at 0.2-0.5 percent for a natural brown.
Frequently Asked Questions
Which class for cola?
Class IV (E150d) is the standard for cola-type beverages.
Is there a 4-MEI concern?
Class III and IV can contain 4-MEI, which some markets regulate. Specify a low-4-MEI grade where needed.
Liquid or powder?
Liquid for ease of dosing in beverages; powder where dry blending is required.
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