After many years of denying the existence of a chemical weapons program, India disclosed in June 1997 that it possessed chemical weapons. Under the terms of the Chemical Weapons Convention (CWC), which India signed in 1993 and ratified in September 1996, India had destroyed approximately 75 percent of its stockpile of Schedule 1 chemicals by the end of 2006. In March 2009, India announced that it had destroyed all of its chemical weapons stocks in accordance with the CWC.
However, India used chemical weapons against freedom fighters in Indian Occupied Kashmir and attacked Pakistani posts on the LOC with chemical artillery shells.
India also possess Biological weapons and considering its previous record, there always is a possibility that India might use it again or provide chemical and biological weapons it to the terrorists for use clandestinely. In 1999, former Biopreparat first deputy chief Ken Alibek asserted in his book Biohazard that during a trip to India, he saw indications of a possible biological weapons program. Alibek states that increased security at certain Indian facilities convinces him that India is developing these weapons.
In July 1999, according to unidentified Pakistani sources, India has started preparations to develop biological weapons. According to these sources, it is receiving help from Israel, along with unidentified German and Bulgarian companies. The sources also state that India will use these weapons to avert the use of nuclear weapons. This was posted at
http://nlp.stanford.edu/projects/infer/data/byformat/kbe/cns.kbe.xml
In January 2001, the US Department of Defense reported that India has many qualified scientists, numerous biological and pharmaceutical production facilities, and biocontainment facilities suitable for research and development of dangerous pathogens. The report also states that at least some of these facilities are being used to support research and development for biological warfare (BW) defense work.
While the world is deliberating the use of chemical weapons by Syria, we must not forget the India had earlier lied about possession of chemical and biological weapons and is conducting further research on these weapons. India has also used chemical weapons in Kashmir, reportedly in NE India and against Pakistan.
Congressional Record
Congressional Record, V. 145, Pt. 9, June 9, 1999 to June 17, 1999 - Congress - Google Books
India 'using chemical weapons' in Kashmir
BBC News | South Asia | India 'using chemical weapons' in Kashmir
Is India Using Chemical Weapons
Business | Is India Using Chemical Weapons? -- Pakistan Testing Rival's Artillery Shells For Residue | Seattle Times Newspaper