Schedule 2 Specification for E 170 calcium carbonateI1
England and Wales
Specification for E 170 calcium carbonate for the purpose of Schedule 1, paragraph 1, Table 1
| (1) European Inventory of Existing Commercial Chemical Substances, as published in OJ No C 146A, 15.6.1990, p.1. | |
| (2) Sum of ethylene oxide and 2-chloroethanol expressed as ethylene oxide (i.e. ethylene oxide + (0.55 × 2-chloroethanol)). | |
| Synonyms | CI Pigment White 18; Chalk |
| Definition | Calcium carbonate is the product obtained from ground limestone or by the precipitation of calcium ions with carbonate ions. |
| Colour Index No | 77220 |
| EINECS numberf1 | Calcium carbonate: 207-439-9 Limestone: 215-279-6 |
| Chemical name | Calcium carbonate |
| Chemical formula | CaCO3 |
| Molecular weight | 100.1 g/mol |
| Assay | Content ≥ 98% on the anhydrous basis |
| Description | White crystalline or amorphous, odourless and tasteless powder |
| Identification | |
|---|---|
| Solubility | Practically insoluble in water and in alcohol. Dissolves with effervescence in diluted acetic acid, in diluted hydrochloric acid and in diluted nitric acid, and the resulting solutions, after boiling, give positive tests for calcium. |
| Purity | |
| Loss on drying | ≤ 2.0% (200°C, 4 hours) |
| Acid-insoluble substances | ≤ 0.2% |
| Magnesium and alkali salt | ≤ 1.0% |
| Fluoride | ≤ 50 mg/kg |
| Antimony (Sb) | ≤ 100mg/kg, singly or in combination |
| Copper (Cu) | |
| Chromium (Cr) | |
| Zinc (Zn) | |
| Barium (Ba) | |
| Arsenic (As) | ≤ 3 mg/kg |
| Lead (Pb) | ≤ 3 mg/kg |
| Cadmium (Cd) | ≤ 3 mg/kg |
| Ethylene oxidef2 | Total residues of ethylene oxide, irrespective of origin, must not exceed 0.1 mg/kg |
Annotations
Commencement
- I1
Sch. 2 in force at 19.2.2025, see reg. 1(2)
Footnotes
- f1
(1)
European Inventory of Existing Commercial Chemical Substances, as published in OJ No C 146A, 15.6.1990, p.1.
- f2
(2)
Sum of ethylene oxide and 2-chloroethanol expressed as ethylene oxide (i.e. ethylene oxide + (0.55 × 2-chloroethanol)).