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Lights, sound, chemical reaction: Facts about Diwali firecrackers | Delhi News

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Types of firecrackers and their composition:
1. Bombs
These include atom bombs, sutli bombs and even a chain or a string of a thousand crackers
Chemicals: A black powder, also known as gun powder, which contains charcoal, sulphur and potassium nitrate. A tight paper tube with a fuse is used to light the powder.
Metal: A composition used in a firecracker might have aluminum instead of or in addition to charcoal to brighten the explosion.
2. Sparklers
These include all fireworks that produce bright and showery light such as anar, chakri and others.
Chemicals: They include chemicals like charcoal, sulphur, aluminium perchlorate or barium nitrate.
Metal: Sparklers contain metals like Iron or steel powder. Also, it is very common for fireworks to contain aluminum zinc or magnesium dust to create bright, shimmering sparks.
3. Aerial fireworks
These include all types of rockets or those that shoot up in the air and then explode chemicals.
Chemicals: These contain chemicals like charcoal, sulphur, potassium nitrate.
Metal: Aluminium
Health hazards of chemicals and metals present in firecrackers
Aluminium: High levels could cause toxicity. People with kidney problems and older people are more vulnerable.
Effects: It can cause skeletal and neuromuscular problems, apart from weakness, bone pain, digestive problems, confusion, headache, heartburn, emotional instability, disturbed sleep.
Sulphur dioxide: Exposure to very high levels can be life-threatening
Effects: It can cause heart, eye, hearing, liver and kidney damage, stomach disorder, suffocation and disturb blood circulation.
Barium: Certain compounds like barium acetate are highly poisonous
Effects: Mild exposure can cause muscle fatigue or weakness, difficulty in breathing, blood pressure changes, facial numbness, gastrointestinal disorders.
Potassium nitrate: It can irritate respiratory tract
Effects: It can cause shortness of breath, gastric and stomach pain, dizziness, bloody diarrhoea, convulsions, mental impairment, redness or itching of skin or eyes.




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