ferrous sulphate

8.2 mg per capsule

Metallic, like ink or blood”

Certified cider flavour standard used to train professional cider tasters to recognize and scale the intensity of metallic character. Metallic notes are derived from contamination of cider with metal ions, either from raw materials or from corrosion of factory equipment. This character primarily affects mouthfeel but occasionally the aroma and colour of the product can be affected..

Food grade | free from sensory impurities | extensively tested | safe to smell and taste.

Flavour cards

Flavour standard information

Technical specification

Assessment
The best way for tasters to detect metallic taints in cider is as follows. Take a little cider into your mouth. Move it around with your tongue for a few seconds then swallow it. To confirm, rub a little of the beer onto the back of your hand and check for metallic odour.
Amount of flavour per capsule
8.2 mg per capsule
Threshold
The flavour threshold of ferrous sulphate in cider is 2.7 mg / l.
Origins
Metallic taints can be derived from contamination of cider with metal ions, either from raw materials or from corrosion of factory equipment.
Importance
Metallic notes can be a taint, and occasionally an off-flavour, in cider. Cider mouthfeel is primarily affected but occasionally product odour can also be influenced by this flavour defect.
CAS registry number
The CAS registry number for ferrous sulphate is 7782-63-0.
Other names
  • ferrous sulfate
  • iron(2+) sulfate
  • iron(2+) sulphate
  • ferrous sulphate heptahydrate
  • ferrous sulfate heptahydrate
  • iron(2+) sulfate heptahydrate
  • iron(II) sulfate heptahydrate
  • iron(II) sulphate heptahydrate
Remarks
Copper, manganese and tin can also generate metallic notes in cider. Occasionally, the presence of lipid oxidation products in cider can give rise to ‘non-metallic’ metallic odours. High concentrations of such metal ions are also associated with development of hazes in cider.
Threshold distribution
Graph
Capsules per pot
10
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£59.00

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