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Appendix 4

Health & Safety

LABELLING

Liquid nitrogen dewars must be clearly and adequately labelled. As a minimum, the label must include:

  • the product's designation, i.e. nitrogen, refrigerated liquid
  • the product's UN number, i.e. UN 1977
  • the product's danger sign, i.e. a green diamond containing a cylinder symbol and the number 2 at the bottom
  • basic safety information for users

The label should be at least 100mm high, unless the size and/or shape of the dewar make this impractical. In this case the label should be as large as possible.