1.1
Reagents:
Sodium nitrite
,
Sulfuric acid
;
0 °C; 0 °C → 60 °C; 0 °C
1.2
Reagents:
Sulfuric acid
;
1 h, 40 °C; 40 °C → rt
1.3
Reagents:
Water
;
cooled
1.4
Reagents:
Sodium hydroxide
Solvents:
Water
;
pH 6

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