why we use only vanilline , acetanilide,& caffeine For the
Calibration of melting point appartus?
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Answer / sachin ghogare
These chemicals are very stable for M.P. test and covers
range between 0-300°c .Easily available in market .
| Is This Answer Correct ? | 49 Yes | 4 No |
These chemicals are very stable and covers
range between 0-300°c .Easily available in market .
vanilline - 81°C to 83°C
Acetanilide - 114°C to 116°C
Phenacetin - 134°C to 136°C
Sulfanilamide - 164.5°C to 166.5°C
Sulfapyridine - 191°C to 193°C
Caffeine - 234°C to 237°C
| Is This Answer Correct ? | 30 Yes | 2 No |
vanilline - 81°C to 83°C (range-1.5°)
Acetanilide - 164°C to 165.7°C (range-1.0°)
Caffeine - 235.6°C to 237.5°C (range-1.0°)
All three standards starting & Ending points is within 1.5°
only.
In our operational way also it covers minimum, middle &
Maximum calibration covered.
| Is This Answer Correct ? | 19 Yes | 4 No |
Answer / ajay vishwakarma
These standard have very sharp melting point in their range
and also they are easily available in market.
| Is This Answer Correct ? | 10 Yes | 3 No |
Answer / ishwar
These standards having sharp melting point.stability.
| Is This Answer Correct ? | 5 Yes | 0 No |
Answer / rupesh
This standards give Linearity
& covers range between 0-300°c .Easily available in market.
| Is This Answer Correct ? | 1 Yes | 0 No |
Answer / renu saini
Becoz its covers whole range of melting point 0- 300°c.it is easily avialable in market.all are usp reference standards
| Is This Answer Correct ? | 2 Yes | 1 No |
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Organic Chemistry 
