{
  "url": "https://openlegislation.uk/preservatives-in-food-regulations-1989/schedule-5/part-I/paragraph-3",
  "json_url": "https://openlegislation.uk/preservatives-in-food-regulations-1989/schedule-5/part-I/paragraph-3.json",
  "legislation": "uksi/1989/533",
  "legislation_title": "The Preservatives in Food Regulations 1989",
  "legislation_url": "https://openlegislation.uk/preservatives-in-food-regulations-1989",
  "path": "schedule/5/part/I/paragraph/3",
  "kind": "paragraph",
  "number": "3",
  "heading": "Reagents",
  "text": "The following reagents shall be used–\n(a) cyclohexane (analytical reagent grade);\n(b) dicholoromethane (analytical reagent grade);\n(c) hydrochloric acid 25 per centum (weight/volume);\n(d) silica gel GF 254 (Merck or equivalent);\n(e) 0.5 per centum (weight/volume) solution of 2,4,7-trinitrofluorenone (TNF) (Fluka, BDH or equivalent) in acetone;\n(f) 0.1 per centum (weight/volume) solution of 2,6-dibromo—p-benzoquinone-chlorimine in ethanol (stable for up to one week if kept in the refrigerator);\n(g) concentrated solution of ammonia, specific gravity: 0.9;\n(h) standard 1 per centum (weight/volume) solution of pure biphenyl in cyclohexane;\n(j) standard 1 per centum (weight/volume) solution of pure 2-hydroxybiphenyl in cyclohexane.",
  "extent": null,
  "status": null,
  "version": "current",
  "annotations": [],
  "outstanding_effects": [],
  "provenance": {
    "source": "legislation.gov.uk",
    "source_url": "https://www.legislation.gov.uk/uksi/1989/533/schedule/5/part/I/paragraph/3",
    "retrieved_at": "2026-10-29T15:46:33.935266+00:00"
  },
  "licence": "Open Government Licence v3.0",
  "licence_url": "https://www.nationalarchives.gov.uk/doc/open-government-licence/version/3/",
  "attribution": "Contains public sector information licensed under the Open Government Licence v3.0. Source: legislation.gov.uk, The National Archives."
}