Reference	Title	Category
ISO/TC 47	Chemistry	A
ISO/TC 58	Gas cylinders	A
ISO/TC 58/SC 2	Cylinder fittings	A
ISO/TC 58/SC 3	Cylinder design	A
ISO/TC 58/SC 4	Operational requirements for gas cylinders	A
ISO/TC 121	Anaesthetic and respiratory equipment	A
ISO/TC 121/SC 6	Medical gas supply systems	A
ISO/TC 158	Analysis of gases	A
ISO/TC 197	Hydrogen technologies	A
ISO/TC 197/SC 1	Hydrogen at scale and horizontal energy systems	A
ISO/TC 220	Cryogenic vessels	A
ISO/TC 265	Carbon dioxide capture, transportation, and geological storage	A
ISO/TC 121/SC 3/JWG 12	Joint ISO/TC 121/SC 3-IEC/SC 62D WG: Home respiratory equipment	C

Notes

Liaisons A: Organizations that make an effective contribution to the work of the technical committee or subcommittee for questions dealt with by this technical committee or subcommittee. 
Liaisons B: Organizations that have indicated a wish to be kept informed of the work of the technical committee or subcommittee. 
Liaisons C: Organizations that make a technical contribution to and participate actively in the work of a working group.