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3-hydroxynaphthalene-2,7-disulphonic acid
c.a.s no.：148-75-4
chemical structural formula： c10h8o7s2
molecular mass：304.2963
chemical name：2- hydroxy-naphthalene-3,6 --disulfonic acid disodium.png)
| appearance |
gray-white powder |
|
content |
above 80% |
|
schaeffer's salt |
below 1.5% |
|
free acid (h2so4) |
below 2% |
|
water insoluble |
below 0.1% |
|
packaging |
25kgwoven bag |
