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9.3
Medical gas identification colours
GAS
OXYGEN
NITROUS OXIDE
CARBON DIOXIDE
CYCLOPROPANE
MEDICAL AIR
ENTONOX 50/50 N
VACUUM
SYMBOL
O
2
N
O
2
CO
2
C
H
3
6
AIR
O/O
N
O + O
2
2
2
-
ISO & UK
White
Blue
Grey
Orange
White and
Black
Blue and White
2
Yellow
USA
GERMANY
Green
Blue
Blue
Grey
Grey
-
Orange
-
Yellow
Yellow
-
-
-
-
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