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Ns2s90-92%、 Crystal Sodium sulfide、10ppm、　20ppm、　30ppm、　50ppm、　80ppm、　120ppm、　1200ppm、　 1500ppm

Sodium sulfide National standard of Peoples Republic of China—Non national standard (Region Grade) enterprise standard

National standard of Peoples Republic of China: GB/T10500-2000

Index item	Index
	First type			Second type		Third type
	Superior Quality	First Grade	Qualified Product	First Grade	Qualified Product	Third type
Na2S Content ≥	60.0	60.0	60.0	60.0	60.0	65.0
Na2SO3　≤	1.0	－	－	－	－	－
Na2S2O3	2.5	－	－	－	－	－
Fe 　　　 ≤	0.002	0.003	0.005	0.015	0.03	0.08
Na2CO3　　≤	2.0	5.0	－	－	－	4.0
Water insoluble≤	0.05	0.05	0.05	0.15	0.15	0.2

Industrial Sodium sulfide to be divided three type in this standard:
1 The first type of Sodium sulfide is general(Commonly know as the Red Alkali)
2 The second type of Sodium sulfide is low iron(Commonly know as the yellow Alkali)
3 The third type of Sodium sulfide is high content.

Industrial Sodium sulfide National standard of Peoples Republic of China / Non national standard / enterprise standard

Sodium sulfide General flake (Enterprise standard)

Index item	Index
sodium sulfide	Na2S	≥　60 %
sodium sulfite	Na2SO3	≤　5.0　%
Fe	Fe	≤　0.15　% 　(1500ppm)
insoluble residue	Water insoluble	≤　0.4 　%
exterior	Aspect	Maroon flake/granule

Sodium sulfide General flake (Enterprise standard)

Index item	Index
sodium sulfide	Na2S	≥　52 %
sodium sulfite	Na2SO3	≤　5.0　%
Fe	Fe	≤　0.15　% 　(1500ppm)
insoluble residue	Water insoluble	≤　0.4 　%
exterior	Aspect	Maroon flake/granule

Sodium sulfide General Granules (Enterprise standard)

Index item	Index
sodium sulfide	Na2S	≥　50 ~ 60 %
sodium sulfite	Na2SO3	≤　5.0　%
Fe	Fe	≤　0.15　% 　(1500ppm)
insoluble residue	Water insoluble	≤　0.4 　%
exterior	Aspect	Maroon flake/granule

（150ppm）Low iron Sodium sulfide(150ppm)

Index item	Index
sodium sulfide	Na2S	≥　50 ~ 60 %
sodium sulfite	Na2SO3	≤　5.0　%
Fe	Fe	≤　0.15　% 　(1500ppm)
insoluble residue	Water insoluble	≤　0.4 　%
exterior	Aspect	Maroon flake/granule

（80ppm）Low iron Sodium sulfide(80ppm)

Index item	Index
sodium sulfide	Na2S	≥　50 ~ 60 %
sodium sulfite	Na2SO3	≤　2.00　%
Sodium thiosulfate	Na2S2O3	≤　2.00　%
Fe	Fe	≤　0.008　% 　(80ppm)
Sodium carbonate	Na2CO3	≤　2.00　%
insoluble residue	Water insoluble	≤　0.20　%
exterior	Aspect	yellow flake/granule

（50ppm）Low iron Sodium sulfide(50ppm)

Index item	Index
sodium sulfide	Na2S	≥　50 ~ 60 %
Fe	Fe	≤　0.005　%　(50ppm)
Sodium carbonate	Na2CO3	≤　2.0　%
insoluble residue	Water insoluble	≤　0.2　%
exterior	Aspect	yellow flake/granule

（30ppm）Ultra low iron Sodium sulfide(30ppm)

Index item	Index
sodium sulfide	Na2S	≥　50 ~ 60 %
Fe	Fe	≤　0.003　%　(30ppm)
Sodium carbonate	Na2CO3	≤　2.0　%
insoluble residue	Water insoluble	≤　0.05　%
exterior	Aspect	yellow flake/granule

(90-92%) Anhydrous Sodium sulfide(90-92%)

Index item	Index
sodium sulfide	Na2S	≥　90-92 %
sodium sulfite+Sodium thiosulfate	Na2SO3十Na2S2O3	≤　3　　%
Moisture	Moisture	≤　0.5　%
Sodium carbonate	Na2CO3	≤　2.00　%
Sodium sulfate	Na2SO4	≤　1.00　%
insoluble residue	Water insoluble	≤　0.05　%
density	density	≤　0.5　　%
exterior	Aspect	Light yellow granule

（42％）Crystal Sodium sulfide(42%)

Index item	Index
crystal sodium sulfide(Na2S.5H2O)	Na2S	ω/% ≥ 42.0
Sodium thiosulfate	Na2S2O3	ω/% ≤ 0.40
sodium sulfite	Na2SO3	ω/% ≤ 0.30
Fe	Fe	ω/ppm ≤ 5
Sodium carbonate	Na2SO4	ω/% ≤ 0.15
insoluble residue	Water insoluble	ω/% ≤ 0.012
exterior	Aspect	White granule

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