Dear Kapil
your topic is quite "old". Check e.g: Import: Process - Basic Data and Tools (EHS-BD) - SAP Library
and any subchapter related there to either "specification import" or "phrase import". Check may be as well: SAP EHS Management for Beginners
Regarding other options of import:
a.) use of EHS OCC EH&S Open Content Connector - Basic Data and Tools (EHS-BD) - SAP Library
b.) use of ALE (e.g. Distributing Specifications Manually - Basic Data and Tools (EHS-BD) - SAP Library)
Pay attention.. Many people does have problems in using Cg33 because they don't understand the "data format" to be prepared to execute the upload
As well you will find some references in this FORUM to a tool called "Data Editor". This solution is only available according to my information a s a special service from SAP and not part of EHS standard.
Check e.g.:
EHS - DATA EDITOR - COPYING FUNCTION
EH&S Data Editor errors (meaning)
EH&S data editor - Logon error
EH&S Data Editor - Create Dangerous Goods Class Load File in Data Editor
C.B.
PS: Example: Transfer File for Specifications - Basic Data and Tools (EHS-BD) - SAP Library
shows the structure of the file to be used