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Sodium Beta-Naphthalenesulphonate: Naphthalene Sulphonated at 170 °C
The salt that caustic soda turns into beta-naphthol, a dye component. Gattermann (1914): heat naphthalene with sulphuric acid at 170 to 180 °C, which favours the beta acid three to one; take the acid up as its calcium salt, let the less soluble beta salt crystallise, and swap calcium for sodium with soda. 50 g of naphthalene give 60 to 70 g. Hot strong acid: goggles and gloves.
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Juu
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Maudhui hatari
Blueprint hii ina taratibu za hatari. Ingia na uwashe maudhui ya hatari katika mipangilio ya akaunti yako ili kuona maagizo ya hatua kwa hatua.
IngiaMchoro huu unatengeneza
CC0 Umma Wote
Mchoro huu umetolewa chini ya CC0. Uko huru kunakili, kubadilisha, kusambaza, na kutumia kazi hii kwa madhumuni yoyote, bila kuomba ruhusa.
Saidia Mtengenezaji kwa kununua bidhaa kupitia Mchoro wao ambapo wanapata Kamisheni ya Mtengenezaji iliyowekwa na Wachuuzi, au unda marudio mapya ya Mchoro huu na uiunganishe kama kiungo katika Mchoro wako kuchangia mapato.