一、化學名稱:磷酸二氫鈉
二、分子式:NaH2PO4;NaH2PO4·H2O;NaH2PO4·2H2O
三、分子量:無水物:120.01;一水物:138.01;二水物:156.01
四、CAS:無水物:7558-80-7;一水物:10049-21-5;二水物:13472-35-0
五、性狀:無色結晶或白色結晶性粉末。無臭。稍有潮解性。相對密度2.04。熔點60℃。易溶于水。不溶于乙醇。100℃以下加熱,可溶于結晶水形成一水鹽。加熱至100℃失去結晶水而成無水物,繼續加熱則變為偏磷酸鈉。
六、用途:緩沖劑、品質改良劑、乳化劑、營養增補劑、抗氧化增效劑、鹽水穿透助劑、糖澄清劑、穩定劑、凝膠劑、禽類燙毛劑。
七、包裝: 內襯聚乙烯塑料袋,外套復合塑料編織袋包裝,每袋凈重25kg。
八、貯存與運輸:本品應貯存在干燥通風清潔的庫房中,裝載運輸時要輕裝輕放,防止包裝破損,防止受潮、受熱,運輸過程中防止雨淋受潮,應與有毒物品隔離。
質量指標 |
Specification |
|
FCC VII |
||
含量(以干基計),w/% |
Content (On Dry Basis),w/% |
98.0-103.0 |
98-103.0 |
||
PH(10g/L溶液,25℃) |
PH(10g/L,25℃) |
4.1-4.7 |
———— |
||
水不溶物,w/% ≤ |
Insoluble Substances,w/% ≤ |
0.2 |
0.2 |
||
重金屬(以Pb計),mg/kg ≤ |
Heavy Metal(As Pb),mg/kg ≤ |
10 |
———— |
||
鉛(Pb),mg/kg ≤ |
Lead(Pb),mg/kg ≤ |
4 |
4 |
||
砷(As),mg/kg ≤ |
Arsenic(As),mg/kg ≤ |
3 |
3 |
||
氟化物(以F計),mg/kg ≤ |
Fluorides (As F),mg/kg ≤ |
50 |
50 |
||
干燥失重,w/%
|
NaH2PO4 ≤ |
Loss On Drying,w/% |
NaH2PO4 ≤ |
2.0 |
2.0 |
NaH2PO4·H2O |
NaH2PO4·H2O |
10.0-15.0 |
10.0-15.0 |
||
NaH2PO4·2H2O |
NaH2PO4·2H2O |
20.0-25.0 |
20.0-25.0 |
1、Chemical Name: Monosodium Phosphate
2、Molecular Formula: NaH2PO4 ; NaH2PO4·H2O ; NaH2PO4·2H2O
3、Molecular Weight: Anhydrous:120.01 ; Monohydrate:138.01 ; Dihydrate:156.01
4、CAS: Anhydrous:7558-80-7 ; Monohydrate:10049-21-5 ; Dihydrate:13472-35-0
5、Character: It is colorless column crystal, odorless, slightly deliquescence. The relative density is 2.04
melting point is 60℃. It is easily soluble in water but insoluble in ethanol. If heated below 100℃, it can
dissolve in its’ own crystal water convert to monohydrate salt. When heated up to 100℃, it’ll lose
crystal water change to anhydrous substances, which will become Sodium Metaphosphate if it
continues to be heated.
6、Usage: In food industry, it is used as buffering,acter improving agent, emulsifier, nutrition supplement, antioxidant additive, brine penetrable agent, sugar clarifier, stabilizer, coagulant fowl scalding agent.
7、Packing: It is packed with polyethylene bag as inner layer a compound plastic woven bag as outer layer. The net weight of each bag is 25kg.
8、Storage Transport: It should be stored in a dry ventilative warehouse, kept away from heat moisture during transportation, unloaded with care so as to avoid damage. Furthermore, it must be stored separately from poisonous substances.