<P> The compound is a derivative of naphthalene and a dark red powder . It usually comes as a sodium salt , but can also be used as both calcium and potassium salts . These salts are soluble in water ; in solution , its maximum absorbance lies at about 504 nm . Its melting point is above 300 ° C ( 572 ° F ) . </P>
<P> The compound is a derivative of naphthalene and a dark red powder . It usually comes as a sodium salt , but can also be used as both calcium and potassium salts . These salts are soluble in water ; in solution , its maximum absorbance lies at about 504 nm . Its melting point is above 300 ° C ( 572 ° F ) . </P>
where does red dye number 40 come from
where does red dye number 40 come from
a derivative of naphthalene and a dark red powder
a derivative of naphthalene and a dark red powder