{"id":540,"date":"2022-10-21T16:29:33","date_gmt":"2022-10-21T16:29:33","guid":{"rendered":"https:\/\/mebicar.pl\/sklep\/cbd-cannabidiol-cannabidiol-krishals-%e2%89%a5-99-85-1000mg\/"},"modified":"2026-08-13T18:24:26","modified_gmt":"2022-10-21T16:29:33","slug":"cannabidiol-2","status":"publish","type":"product","link":"https:\/\/mebicar.pl\/en\/sklep\/cannabidiol-2\/","title":{"rendered":"Cannabidiol Crystals in the Store: A Four-Stage Laboratory Handling Protocol"},"content":{"rendered":"\n

Cannabidiol reaches the laboratory as a crystalline phytocannabinoid with registry number 13956-29-1, summary formula C21H30O2 and a formula weight of 314.5. The sequence below is the order in which a receiving laboratory should touch the container, from the courier handover to the moment the material leaves the store for an experiment.<\/p>\n\n\n\n

Stage one: accepting the delivery<\/h2>\n\n\n\n
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  1. Check the outer packaging for damage and for any sign that the cold chain or the seal was disturbed.<\/li>\n
  2. Compare the registry number on the inner label with the number on the delivery note and on the certificate.<\/li>\n
  3. Confirm that the certificate refers to the same batch number that is printed on the container, not to a neighbouring lot.<\/li>\n
  4. Enter the material in the substance ledger before the container is opened for the first time.<\/li>\n<\/ol>\n\n\n\n

    The second step deserves attention, because the racemic form of this molecule carries a different registry number, 3556-78-3, and the two are easy to confuse in an ordering system. A mismatch found at this stage costs a phone call; the same mismatch found after a week of work costs the week. See also our reagent-grade material: L-Tyrosine \/ L-Tyrosyna \/Tyrozyna Czysto\u015b\u0107 \u2265 99% 1<\/a>.<\/p>\n\n\n\n

    Stage two: identity and purity control<\/h2>\n\n\n\n
      \n
    1. Record an infrared or Raman spectrum and compare it with the retained reference trace for the same compound.<\/li>\n
    2. Run reversed-phase liquid chromatography with the diode array set to cover the resorcinol chromophore.<\/li>\n
    3. Check the cannabinoid profile of the batch against the certificate, including the determined tetrahydrocannabinol content.<\/li>\n
    4. Report residual solvents from headspace gas chromatography and water content from Karl Fischer titration as separate numbers.<\/li>\n<\/ol>\n\n\n\n

      The cannabinoid content of a batch is read from the certificate for that batch. It is never assumed from the plant source, from the supplier reputation or from a previous delivery, because extraction and purification conditions differ from run to run. See also our catalogue listing: Fenyloalanina \/ L-Phenylalanine \u2265 99% 1000mg<\/a>.<\/p>\n\n\n\n

      Stage three: storage between experiments<\/h2>\n\n\n\n
        \n
      1. Keep the sealed container cold, dry and in the dark, since this class of molecule is sensitive to light and to atmospheric oxygen.<\/li>\n
      2. Blanket the headspace with inert gas after each withdrawal if the container will be opened repeatedly.<\/li>\n
      3. Allow the container to equilibrate to room temperature before breaking the seal, so that moisture does not condense on cold crystals.<\/li>\n
      4. Split the material into single-experiment portions rather than reopening the main container many times.<\/li>\n<\/ol>\n\n\n\n

        Stage four: issue and disposal<\/h2>\n\n\n\n
          \n
        1. Weigh out only the mass required, on a calibrated balance behind a draught shield.<\/li>\n
        2. Record the date, the mass taken, the operator and the remaining stock in the ledger.<\/li>\n
        3. Label every prepared solution with substance, solvent, concentration and preparation date.<\/li>\n
        4. Route residues, rinsings and expired solutions to organic chemical waste, and archive the batch file after the container is emptied.<\/li>\n<\/ol>\n\n\n\n

          Run in this order, the protocol keeps identity, quality and stock records aligned at every point, which is exactly what an auditor asks to see later.<\/p>\n\n\n\n

          Related reagents<\/h2>\n\n\n\n