IMDG Code 36th amendment section 7.3.4.1 states “Dangerous goods which have to be segregated from each other shall not be transported in the same cargo transport unit. Exception when segregation requirement is “away from” each other, in which case they may be transported in same container provided such consolidation is approved by the competent authority.
Below table may be used for checking whether different dangerous goods are allowed to be loaded in same container or not.
IMDG Code Compliance Centre 