different between chemicals vs reagents

chemicals

chemicals From the web:

• what chemicals are in cigarettes
• what chemicals are released during sex
• what chemicals are in vape
• what chemicals cause hair loss
• what chemicals are bad for your hair
• what chemicals are released during exercise
• what chemicals are in tap water
• what chemicals are used in fracking

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reagents

reagents From the web:

• what reagents are needed for pcr
• what reagents are required to convert cyclohexene to cyclohexanol
• what reagents are required for pcr
• what reagents are used for the voges-proskauer test
• what reagents are required to perform pcr
• what reagents are required to convert 1-propene to propane
• what reagent was used to test for starch
• what reagents are required for the sanger sequencing method