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Bulletin of Occupational & Environmental Health

Hazard Evaluation Of Chemical Risk In Industries Of Delhi

Author(s): .

Vol. 1, No. 1 (2004-01 - 2004-06)

Chemicals are used in all the industries in one way or another. The chemicals have their identical properties. The chemicals exit in all the three forms of matter (solid, liquid and gas). These chemicals have many adverse effects on human health. The chemicals affect human health in one way or other, but only the perfect dose of exposure can save the human health from an adverse effect. Chemicals enter the body by all the three routes of exposure (inhalation, ingestion and dermal).

Centre for Occupational and Environmental Health, Lok Nayak Hospital, and Chief Inspector of Factories, Labor Department, Government of NCT Delhi in combine has planned for a detail survey of the hazard and risk evaluation due to chemicals in selected factories of Delhi. Conducting walk through survey in selected industries to evaluate chemical hazard will carry out the project. Survey team will consist of a Factory Inspector, an Industrial Hygienist, and a Physician. Walk through survey is a qualitative part of the survey.

Effects of chemicals on human health.

S. no
Chemical name
Health effects
Asbestosis, gastrointestinal cancer, lung cancer and mesothelioma .
Leukemia, leukopenia, splenic hyperplasia, nasal irritation.
Byssinosis, chest tightness.
Nasal septum perforation, asthma, leukocytosis and leukopenia.
Irritation of nose, eyes and throat, intestinal cramps with flatus and bloody stools.
Muscle weakness, renal insufficiency, chromosome aberration.
Chest tightness, personality change, polyneuropathy, kidney failure.
Vinyl chloride
Angiosarcoma of Liver (liver cancer), Raynaud\'s syndrome, gastric ulcers and bleeding.

Methodology: The surveyors will collect the information of hazardous agents and assess workers. The survey of chemical agents will be done by checklist. The checklist will have following components:

  • Classification of chemicals according to their properties.
  • Safety in storage of hazardous chemicals.
  • Hazard communication.
  • Training and Protection.

The Physician will do a health assessment of the subjects. The subjects will be interviewed using interview schedule. For health assessment the health assessment questionnaire will be used.

For quantitative analysis an Industrial Hygienist will undertake personal air sampling of solvents and dust.

Sampling of solvents and dust:

Chemical Hazard
Sampling media
Flow rate (ml/min)
Analytical method
Filter cassette with PVC filter


Sorbent tube
200 - 500


A suitable number of samples will be incorporated into the project in each section of selected industries.

Project Outcome and Benefits:

  • Help in developing chemical inventory in various industries.
  • Help in identifying the safety issues in the industries.
  • The information will be used to establish a system of occupational health and safety in Delhi factories with regard to the use, handling, storage, on-site transportation and disposal of chemicals.
  • The project outcome would help in raising the standard of occupational health and safety in Delhi factories as is happening in other countries.
  • The project will help in the development of training on chemical safety.
  • This would lead to higher productivity, less injuries, less illness and add to the well being of workers.
  • This would enable the industry to compete globally and enhance their image.

1 International Labour Convention on Chemical Safety; Convention No. 170,1990. International Labour Office, Geneva.
2 Recommendations on chemical safety No. 177. ILO, Geneva.
3 Fundamentals of Industrial Hygiene, ACGIH. Eighth Edition. USA
4 The Factories Act 1948.
5 Agency for Toxic Substances and Disease Registry.

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