Ref. Technical regulations of flammable liquid, the states fire inspection 15. of June 1985 (now under alert border).
Liquid: flowing substance by normal temperature and pressure.
Flame spot: The lowest temperature where a liquid release ignited steam
Flammable liquid: liquid with flame spot under 100 oC.
Class I: Flammable liquid with flame spot under 21 oC.
Class II: Flammable liquid with flame spot on 21-55 oC.
Class III: Flammable liquid with flame spot over 55-100 oC.
All 3 classes are classified in subclass I of liquid which are not water miscible in any kind of relation and subclass II which is water miscible in any relation.
| Class | Storage unit | maximum storage in glass | maximum storage in type verified plastic and metal packaging |
| I | 1 L | 2.5 L | no limitation up to 25 L |
| II | 5 L | 5 L | no limitation up to 125 L |
| III | 50 L | 10 L | no limitation up to 1250 L |
Plastic packaging over 125 mL always have to be type verified of Alert border.
They referred amount includes the sum of alike storage, consumption and waste.
There may only be stored maximum 25 storage units pr. laboratory in total.
Barrel with flammable liquid of class I-1, I-2, II-1 and III-1 may not be disposed in building exit points (hallway, stairs and so on).
Avoid working near open fire or at places with risk of spark formation.
OBS: Explosive dangerous substances, for instance diethylether and petroleumether, may not be stored in a normal closet.
| substance name | flame spot (oC) | Group | source |
| Acetylaldehyd | -38 | I-2 | c |
| Acetone | -19 | I-2 | a |
| Acetonitril (metylcyanid) | 2 | I-2 | c |
| iso-Amylalkohol (isopentylalkohol) | 18 | I-1 | b |
| Benzen | -11 | I-1 | a |
| n-Butanol | 29 | II-1C | c |
| 2-Butanol (sec-butanol) | 24 | II-1 | c |
| tert-Butanol | 11 | I-2 | c |
| iso-Butanol | 27 | II-1 | c |
| Butylacetat | 22 | II-1 | a |
| n-Butylchlorid | -7 | I-1 | b |
| Carbondisulfid (svovlkulstof) | <-20 | I-1 | c |
| Cellosolve (2-ethoxyethanol) | 40 | II-2 | c |
| Cyanbrinte (blåsyre) | -18 | I-2 | a |
| Cyclohexan | -18 | I-1 | b |
| Cyclohexanon | 43 | II-2 | b |
| Diethylamin | <-20 | I-2 | c |
| Diethylether | -45 | I-1 | a |
| N,N-Dimethylformaid (DMF) | 58 | III-2 | c |
| Dimethylsulfoxid (DMSO) | 95 | III-2 | b |
| Dioxan | 12 | I-1 | c |
| Acetic acid, konc. | 40 | II-2 | c |
| Acetic acid anhydrid | 49 | II-2 | c |
| Ethanol | 13 | I-2 | * |
| Ethylacetat | -4 | I-1 | c |
| Ethylenchlorhydrin | 55 | III-2 | c |
| Ethylendiamin | 34 | II-2 | c |
| Iso-Hexan | <-20 | I-1 | c |
| n-Hexan | -22 | I-1 | c |
| n-Heptylalkohol (1-Heptanol) | <21 | I-1 | a |
| Methanol | 11 | I-2 | a |
| 2-Methoxyethanol | 37 | II-2 | c |
| Methylisobutylketon (MBIK) | 14 | I-1 | c |
| Mineralsk terpentin | <60 | III-1 | a |
| Nitrobenzen | 88 | III-1 | c |
| Iso-Octan | -12 | I-1 | a |
| Pentan | <-20 | II-1 | a |
| 1-Pentanol | 38 | II-1 | a |
| Propanol (1-Propanol) | 22 | II-2 | b |
| iso-Propanol | 12 | I-2 | a |
| iso-Propylether | -22 | I-1 | b |
| Pyridin | 17 | I-2 | c |
| Styren (vinyl acid) | 32 | II-1 | a |
| Tetrahydrofuran (THF) | -17 | I-2 | a |
| Toluen | 6 | I-1 | a |
| Trichlorethan | 32 | II-1 | a |
| Triethylamin | -7 | I-2 | c |
| Triethylamin (30 %i vand) | <-30 | I-2 | a |
| Xylen (o-, m- og p-) | 25-30 | II-1 | a |
Information in the above scheme comes from following source:
a: Chemical and safety, Technical Publisher, 1976
b: Merck Index, 11th edition, 1989
c: Hommel's Handbuch der gefährlichen Güter, 1973/74
*: see special instructions
Moreover please refer to KIROS Database and laboratories' collection of workplace manuals.