On 20 April, the Indian government decided that until 3 May non-essential activities must remain shut down. Some additional activities, however, are allowed to open, including companies in rural areas and in Special Economic Zones and manufacturing facilities of essential goods, such as pharmaceuticals or food. Chemicals as such are not mentioned. If a facility is reopened it must undertake all health and safety measures listed in the guidelines, such as providing transportation for workers and mandatory thermal screening at the entry and exit points of the worksite. All goods traffic is allowed to run. See here and see here for additional info on Haryana and Himachal Pradesh