Sodium dithionite 连二亚硫酸钠

CAS 7775-14-6 MFCD00011640

化学结构图

7775-14-6
SMILES: O=S([O-])S(=O)[O-].[Na+].[Na+]

化学属性

Mol. Formula2 Na . O4 S2
Mol. Weight174.11
Melting PointNo Data Available
TSCAYes
Density2.13
Boiling Point
Solubility250 g/L (20°C)
Flash Point-

别名和识别编码

Chemical NameSodium dithionite
MDL Number-
CAS Number7775-14-6
Synonym HYDROSULPHITE OF SOD SODIUM HYPOSULFITE Sodium Hydrosulfite (85%) {} {} {} {} {} {} {} {} {} {LY} Sodium Hydrosulfite, 85% {} {} {} {} {} {} {} {} {} {} {} {} {} {} {} {} {} {} {} {} {} {} {} {} {} {} {} {} {} {} {} {} {} {} {} {} {} {} {} {} {} {LY} Sodium Hydrosulfite, 85% {} {} {} {} {} {} {} {} {} {} {} {} {} {} {} {} {} {} {} {} {} {} {} {} {} {} {} {} {} {} {} {} {} {} {} {} {} {} {} {} {} {} {} {} {} {} {} {} {} {} {} {} {} {} {} {} {} {} {} {} {} {} {} {} {} {} {} {} {} {} {} {} {} {} {} {} {} {} {} {} {} {} {} {} {} {} {} {} {} {} {} {} {} {} {} {} {} {} {} {} {} {} {} {} {} {} {} {} {} {} {} {} {} {} {} {} {} {} {} {} {} {} {} {} {} {} {} {} {} {} {} {} {} {} {} {} {} {} {} {} {} {} {} {} {} {} {} {} {} {} {} {} {} {} {} {} {} {} {} {} {} {} {} {} {} {} {} {} {} {} {} {} {} {} {} {} {} {} {} {} {} {} {} {} {} {} {} {} {} {} {} {} {} {} {} {} {} {} {} {} {} {} {} {} {} {} {} {} {} {} {} {} {} {} {} {} {
EC Number231-890-0
Merck Number8626
PubChem Substance ID24489
Chemical Name Translation连二亚硫酸钠
Reaxys-RN1210429
LabNetwork Molecule IDLN00193173
InChIInChI=1S/2Na.H2O4S2/c;;1-5(2)6(3)4/h;;(H,1,2)(H,3,4)/q2*+1;/p-2
Canonical SMILES-
信息真实价格透明    资金保障    专业采购外包团队在线服务   
信息真实价格透明    资金保障    专业采购外包团队在线服务   
品牌质保精细包装    现货库存    一流品牌服务   

分类

  • {SNA} Essential Chemicals, Research Essentials, Salts, Sodium Salts
  • {SNA} Chemical Synthesis, Inorganic Salts, Sodium, Synthetic Reagents

产品应用

  • 它是一种强还原剂,能还原许多金属盐成为金属。

相关文献及参考

  • Also useful in small amounts as a decolorizing agent in the purification of organic compounds; see, e.g.: Org. Synth. Coll., 3, 86, 637 (1955); 4, 45 (1963).
  • Nitroso compounds to amines: Org. Synth. Coll., 2, 33 (1943); 4, 247, (1963). Azo compounds to amines: Org. Synth. Coll., 1, 49 (1941); 2, 35, 39 (1943). Quinones to hydroquinones: Org. Synth. Coll., 4, 16 (1963). Aldehydes and ketones to alcohols: Synthesis, 246 (1977); for a phase-transfer method giving improved yields, see: J. Chem. Soc., Chem. Commun., 1080 (1979). For selective 1,4-reduction of conjugated aldehydes and ketones in the presence of unconjugated, see: Tetrahedron Lett., 36, 1107 (1995). Dehalogenation of ɑ-halo ketones: Synth. Commun., 12, 261 (1982).
  • Examples of reductions with the reagent:
  • For a review of reductions with dithionite, including nitrogen functions, carbonyl compounds and 1,4-reductions of enones, see: Bull. Soc. Chim. Fr., 565 (1986).
  • Merck: 14,8626
  • Useful reducing agent for a variety of functional groups. Often used in aqueous mixtures in combination with a base such as bicarbonate to prevent decomposition of the reagent by acid.

安全信息

Safety Statements
  • S26 In case of contact with eyes, rinse immediately with plenty of water and seek medical advice 眼睛接触后,立即用大量水冲洗并征求医生意见;
  • S28 After contact with skin, wash immediately with plenty of ... (to be specified by the manufacturer) 皮肤接触后,立即用大量…(由生产厂家指定)冲洗;
  • S43 In case of fire use ... (indicate in the space the precise type of fire-fighting equipment. If water increases the risk add -?Never use water) 着火时使用(指明具体的消防器材种类,如果用水增加危险,注明“禁止用水”
  • S7/8 Keep container tightly closed and dry 保存在严格密闭容器中,保持干燥;
Packing GroupII
UN Number 1384
Risk Statements
  • R22 Harmful if swallowed 吞咽有害
  • R31 Contact with acids liberates toxic gas 与酸接触释放出有毒气体
  • R7 May cause fire 会导致起火
Storage condition +20°C 20 20°C 20℃ Moisture Sensitive RT°C Store at RT. 密封保存
WGK Germany1
GHS Symbol
Precautionary statements
  • P233 Keep container tightly closed. ?保持容器密闭。
  • P235+P410
  • P264 Wash hands thoroughly after handling. 处理后要彻底洗净双手。
  • P280 Wear protective gloves/protective clothing/eye protection/face protection. 戴防护手套/防护服/眼睛的保护物/面部保护物。
  • P301+P312
  • P302+P350
  • P312 Call a POISON CENTER or doctor/physician if you feel unwell. 如果你感觉不适,呼叫解毒中心或医生/医师。
  • P332+P313
  • P337+P313
  • P362 Take off contaminated clothing and wash before reuse. 脱掉污染的衣服,清洗后方可重新使用
  • P407 Maintain air gap between stacks/pallets. 在堆叠/货板间保持气隙。
  • P420 Store away from other materials. 远离其他材料。
  • P501 Dispose of contents/container to..… 处理内容物/容器.....
Signal word Danger
Hazard statements
  • H251 Self-heating: may catch fire 自我放热:可能着火
  • H302 Harmful if swallowed 吞食有害
Personal Protective Equipment Eyeshields, full-face particle respirator type N100 (US), Gloves, respirator cartridge type N100 (US), type P1 (EN143) respirator filter, type P3 (EN 143) respirator cartridges
Hazard Codes 4.2
Hazard Class4.2
Warnings 危化品目录(2015)
Restrict 危险品

其他信息

  • 参考质量标准一:HG 2682-1995 含量(Na2S2O4)/% ≥85.0 澄清度 微混 重金属(以Pb计)/% ≤0.001 砷(以As计)/% ≤0.0003 锌(Zn)/% ≤0.004 乙二胺四乙酸二钠含量 合格 甲酸盐(以甲酸计)/% ≤0.05
  • 毒性:ADIO~0.7mg/kg(以SO2计,FAO/WHO,1999)。 LD 50 600~700mg/kg(以SO2计,兔子,经口)。
  • Acros Org
  • 方法二:锌粉二氧化硫法 在35~45℃下SO2与锌粉一水悬浮液反应生成连二亚硫酸锌,反应终点PH值为3.0~3.5;然后加入到18%的碳酸钠(或氢氧化钠)溶液中,在28~35℃下反应生成低亚硫酸钠和氢氧化锌悬浮液。反应如下: 2SO2+ZnS2O4[NaOH]→Na2S2O4+Zn(OH)2↓ 反应物经压滤除去氢氧化锌沉淀(回收制氧化锌)后,往滤液中加入氯化钠,并冷却至20℃,使低亚硫酸钠结晶析出,滤出晶体后用酒精脱水干燥即得产品。 甲酸钠法 在不锈钢反应釜中先加入一定量的甲酸钠甲醇溶液,并用二氧化硫甲醇溶液中和至微酸性;然后在70℃下,同时加入二氧化硫甲醇溶液(含SO2约260g/L)和碱甲醇溶液(含氢氧化钠约170g/L),控制加料
  • 外观性质:白色砂状结晶或淡黄色粉末。
  • 用途五:它是一种强还原剂,能还原许多金属盐成为金属,分析氮肥、氨水和碳酸氢铵脱硫液。广泛用于印染工业,如棉织物助染剂和丝毛织物的漂白等。还用于医药、选矿、铜版印刷、硫脲及其它硫
  • 上游原料:乙醇 --> 氢氧化钠 --> 甲醇 --> 锌粉 --> 二氧化硫 --> 焦亚硫酸钠 --> 甲酸钠 --> 氢氧
  • 下游产品:3-甲基黄嘌呤 --> 发光氨 --> 4-(1,2,3-噻二唑)苯胺 --> 4-氮杂吲哚 --> 3-氟-4-(三氟甲氧基)苯胺 --> 三甲基氢醌 --> 维生素 B2 --> 2-氨基-5-羟基苯甲酸 --> 水杨酸钠 --> 4,5,6-三氨基嘧啶 --> 5,6-二氨基脲嘧啶 --> 8-氮杂腺嘌呤 --> 分散兰BGL --> (2-氰基-3-吡啶基)氨基甲酸叔丁酯 --> 4,5,6-三氨基嘧啶硫酸盐 --> 六氯芬 --> 对氨基苯甲醇 --> 8-氮鸟嘌呤 --> N-(2,5-二甲氧基苯基)-2-羟基二苯并呋喃-3-甲酰胺 --> 连二亚硫酸钠 --> 核黄酸 --> 2-氨基-5-氯苯甲醛 --> 3-羟基-N-(2-甲氧基苯基)-2-萘甲酰胺 --> 4,4'-二氨基二苯胺硫酸盐 --> 2,5-二氨基-4,6-二羟基嘧啶 --> 5,6-二氨基-1-甲基尿嘧啶 --> 5-氨基尿嘧啶 --> 5-氟吲哚-2-羧酸 --> 阳离子翠蓝GB --> 乙
  • 方法一:将130 kg锌粉加入打浆槽中,加水520 kg,搅拌成锌浆。压入列管式反应器,开循环泵用冷水冷却至40~45 ℃,使锌浆循环吸收SO 2 反应。制备连二亚硫酸锌,终点时物料pH值3~3.5。 在另一个反应釜中加入相对密度1.19~1.21的液碱770 kg。边搅拌边加入上述制得的连二亚硫酸锌溶液,在28~35 ℃下进行复分解反应。达终点时pH值为12~13,压滤,滤液进行盐析。析出结晶后离心分离。滤饼用乙醇洗3~4次,用热风干燥(120~140 ℃)得成品。
  • Sigma Aldrich:7775-14-6(sigmaaldrich)
  • 上游原料:乙醇 --> 氢氧化钠 --> 甲醇 --> 锌粉 --> 二氧化硫 --> 焦亚硫酸钠 --> 甲酸钠 --> 氢氧化锌 --> 不锈钢反应釜 --> 亚硫酸钠 七水 --> 低
  • 图谱信息:连二亚硫酸钠(7775-14-6)红外图谱(IR1)
  • 用途一:主要用作印染还原剂,纸浆、麻、油等的漂白剂,并供制药、分析试剂等用
  • 鉴别试验:在1%试样液10ml中,加硫酸铜试液(TS-78)lml,应呈灰黑色。 在1%试样液10
  • 鉴别试验:在1%试样液10ml中,加硫酸铜试液(TS-78)lml,应呈灰黑色。 在1%试样液10ml中,加高锰酸钾试液(TS-19
  • 用途二:在分析上用作氧气吸收剂,还用作染料中间体和漂白剂

系列性分类


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