United Nations Environment Programme
   Ozone Secretariat


Laboratory and analytical uses

Pursuant to Decision X/19 (4), the Secretariat is listing below decisions by the Parties on laboratory and analytical uses that should no longer be eligible for production and consumption of controlled ozone-depleting substances under the global exemption:

  • Conditions applied to exemption for laboratory and analytical uses (Annex II of the Report of the Sixth Meeting of the Parties - See below)

  • Categories and examples of laboratory uses (Annex IV of the Report of the Seventh Meeting of the Parties)

  • Uses excluded from the global essential-use exemption (Decision VII/11 (6)):

  • (a)        Refrigeration and air-conditioning equipment used in laboratories, including refrigerated laboratory equipment such as ultra-centrifuges;

    (b)        Cleaning, reworking, repair, or rebuilding of electronic components or assemblies;

    (c)        Preservation of publications and archives; and

    (d)        Sterilization of materials in a laboratory;

  • Uses eliminated from the global exemption for laboratory and analytical uses (Decision XI/15)

  • (a)  Testing of oil, grease and total petroleum hydrocarbons in water;

    (b)  Testing of tar in road-paving materials; and

    (c)  Forensic finger-printing.

  • Uses for which TEAP has identified alternatives are available (Decision XXI/6)

Noting that, as summarised below:

(a) Analyses in which the ODS is used as a solvent for spectroscopic measurements:

(i)     of hydrocarbons (oil and grease) in water or soil
(ii)    of simethicone  (polydimethylsiloxane)
(iii)    when recording infrared and nuclear magnetic resonance spectra, including hydroxyl index

(b) Analyses in which the ODS is used as a solvent for electrochemical methods of analysis of:

(i)     cyanocobalamin
(ii)    bromine index

(c) Analyses involving selective solubility in the ODS of:

(i)     cascarosides
(ii)    thyroid extracts
(iii)   polymers

(d) Analyses in which the ODS is used to preconcentrate the analyte, for:

(i)     liquid chromatography (HPLC) of drugs and pesticides
(ii)    gas chromatography of organic chemicals such as steroids
(iii)   adsorption chromatography of organic chemicals

(e) Titration of iodine with thiosulfate (iodometric analyses) for determination of:

(i)     iodine
(ii)    copper
(iii)   arsenic
(iv)   sulphur

(f) Iodine and bromine index measurements (titrations)

(g) Miscellaneous analyses, namely

(i)    stiffness of leather
(ii)    jellification point
(iii)   specific weight of cement
(iv)   gas mask cartridge breakthrough

(h) Use of ODS as a solvent in organic chemical reactions

(i)   O- and N-difluoromethylation

(i)   General use as laboratory solvent, namely

(i)   washing of NMR tubes
(ii)   removal of greases from glassware

Category of laboratory and analytical critical use to allow methyl bromide to be used (Decision XVIII/15(2))

Subject to the conditions applied to the exemption for laboratory and analytical uses contained in annex II to the report of the Sixth Meeting of the Parties, it was decided by the Parties to the Montreal Protocol at their Eighteenth Meeting to adopt a category of laboratory and analytical critical use to allow methyl bromide to be used:

“(a)      As a reference or standard:

(i)         To calibrate equipment which uses methyl bromide;
(ii)        To monitor methyl bromide emission levels;
(iii)       To determine methyl bromide residue levels in goods, plants and commodities;

(b)        In laboratory toxicological studies;

(c)        To compare the efficacy of methyl bromide and its alternatives inside a laboratory;

(d)        As a laboratory agent which is destroyed in a chemical reaction in the manner of feedstock;”


Conditions applied to exemption for laboratory and analytical uses
[Annex II of the report of the Sixth Meeting of the Parties]

  1. Laboratory purposes are identified at this time to include equipment calibration; use as extraction solvents, diluents, or carriers for chemical analysis; biochemical research; inert solvents for chemical reactions, as a carrier or laboratory chemical and other critical analytical and laboratory purposes. Production for laboratory and analytical purposes is authorized provided that these laboratory and analytical chemicals shall contain only controlled substances manufactured to the following purities:



    CTC (reagent grade)














    Other w/Boiling P>20o C


    Other w/Boiling P<20o C


  2. These pure controlled substances can be subsequently mixed by manufacturers, agents, or distributors with other chemicals controlled or not controlled by the Montreal Protocol as is customary for laboratory and analytical uses.

  3. These high purity substances and mixtures containing controlled substances shall be supplied only in re-closable containers or high pressure cylinders smaller than three litres or in 10 millilitre or smaller glass ampoules, marked clearly as substances that deplete the ozone layer, restricted to laboratory use and analytical purposes and specifying that used or surplus substances should be collected and recycled, if practical. The material should be destroyed if recycling is not practical.

  4. Parties shall annually report for each controlled substance produced: the purity; the quantity; the application, specific test standard, or procedure requiring its uses; and the status of efforts to eliminate its use in each application. Parties shall also submit copies of published instructions, standards, specifications, and regulations requiring the use of the controlled substance.

  © Ozone Secretariat 2004