JSP 375 Vol 2 

MoD Health & Safety Handbook 

PART II   CLASSES OF SUBSTANCES NOT SPECIFICALLY NAMED IN PART I  

Class of Substance 

Notifiable 

quantity 

(tonnes) 

1. Gas or any mixture of gases which is flammable in air and is held in the installation as 

15 

a gas 

2. A substance or any mixture of substances which is flammable in air and is normally 

25 being the 

held in the installation above its boiling point (measured at 1 bar absolute) as a liquid or 

total quantity of 

as a mixture of liquid and gas at a pressure of more than 1.4 bar absolute. 

substances 

above the 

boiling points 

whether held 

singly or in 

mixtures. 

3. A liquefied gas or any mixture of liquefied gases, which is flammable in air, has a 

50 being the 

boiling point of less than 0oC (measured at 1 bar absolute) and is normally held in the 

total quantity of 

installation under refrigeration or cooling at a pressure of 1.4 bar absolute or less. 

substances 

having boiling 

points below 

0

o

C whether 

held singly or in 

mixtures. 

4. A liquid or any mixture of liquids not included in items 1 to 3 above, which has a flash 

10,000 

point of less than 21

o

C. 

Leaflet 5 Annex D Appendix 1 

Page 2 

 April 

2003