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METOL, also known as metol, is a widely used photographic developer chemical with the chemical formula C6H5NH2SO3Na. It is a white crystalline powder that dissolves easily in water and is primarily used in black and white film development to reduce silver bromide to metallic silver, creating the image. METOL is known for its high sensitivity and sharpness, making it a popular choice among photographers. However, it is also a hazardous substance and can cause skin and respiratory irritation, so proper handling and safety precautions are essential when using it.

1936-57-8

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1936-57-8 Usage

Check Digit Verification of cas no

The CAS Registry Mumber 1936-57-8 includes 7 digits separated into 3 groups by hyphens. The first part of the number,starting from the left, has 4 digits, 1,9,3 and 6 respectively; the second part has 2 digits, 5 and 7 respectively.
Calculate Digit Verification of CAS Registry Number 1936-57:
(6*1)+(5*9)+(4*3)+(3*6)+(2*5)+(1*7)=98
98 % 10 = 8
So 1936-57-8 is a valid CAS Registry Number.
InChI:InChI=1/C7H9NO.H2O4S/c1-8-6-2-4-7(9)5-3-6;1-5(2,3)4/h2-5,8-9H,1H3;(H2,1,2,3,4)

1936-57-8Relevant academic research and scientific papers

A one-pot synthesis of metol sulphate employing phase-transfer catalysis

Nag, Ahindra,Sarkar, Samir K.,Palit, Sunanda K.,Pandey, Shakti

, p. 64 (2007/10/02)

A one-pot two-step synthesis of metol sulphate using phase transfer catalysis is reported.

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