sodium hydroxide

• ChemBase ID: 103898
• Molecular Formular: NaO
• Molecular Mass: 38.98917
• Monoisotopic Mass: 38.9846839
• SMILES: [OH-].[Na+]
• Canonical SMILES: [OH-].[Na+]
• InChI: InChI=1S/Na.H2O/h;1H2/q+1;/p-1
• InChIKey: HEMHJVSKTPXQMS-UHFFFAOYSA-M

NAMES AND DATABASE IDS

Names

• IUPAC name: sodium hydroxide; sodium oxidanide
• IUPAC Traditional name: sodium hydroxide; potassium OH-; sodium oxidanide
• Synonyms: Sodium hydroxide, pearl; Sodium hydroxide, pellets; Sodium hydroxide, flake; Sodium hydroxide, 0.05N Standardized Solution; Sodium hydroxide (low chloride), ACS; Sodium hydrate; Sodium hydroxide, 0.01N Standardized Solution; Sodium hydroxide, 0.1N Standardized Solution; Sodium hydroxide, 0.5N Standardized Solution; Sodium hydroxide, 5.0N Standardized Solution; Sodium hydroxide, 1.0N Standardized Solution; Sodium hydroxide, 10.0N Standardized Solution; Sodium hydroxide, 2.0N Standardized Solution; Sodium hydroxide, Acculute Standard Volumetric Solution, Final Concentration 0.1N; Sodium hydroxide, Acculute Standard Volumetric Solution, Final Concentration 1.0N; Sodium hydroxide, Acculute Standard Volumetric Solution, Final Concentration 0.5N; ‘Caustic soda’; Natrii hydroxidum; Sodium hydroxide concentrate; Caustic soda; SODIUM HYDROXIDE; SODIUM HYDROXIDE, NF; 10 N SODIUM HYDROXIDE SOLUTION; Sodium hydroxide solution; Sodium hydroxide; Sodium hydroxide solution; Sodium Hydroxide 1N; Sodium hydroxide standard solution; 珠状氢氧化钠; 氢氧化钠,颗粒状; 氢氧化钠片; 氢氧化钠(低氯), ACS; 氢氧化钠, 0.01N 标准溶液; 氢氧化钠, 0.1N 标准溶液; 氢氧化钠, 0.5N 标准溶液; 氢氧化钠, 5.0N标准溶液; 氢氧化钠, 1.0N标准溶液; 氢氧化钠, 10.0N 标准溶液; 氢氧化钠溶液; 氢氧化钠, 2.0N标准溶液; 氢氧化钠, 0.05N 标准溶液; 氢氧化钠, 可稀释标准标定液, 最终浓度 0.1N; 氢氧化钠, 可稀释标准标定液, 最终浓度 1.0N; 氢氧化钠, 可稀释标准标定液, 最终浓度 0.5N; 氢氧化钠; 氢氧化钠 溶液; 苛性钠; 氢氧化钠; 氢氧化钠标准品 溶液; More...

Database IDs

• CAS Number: 1310-73-2
• EC Number: 231-791-2; 215-185-5
• MDL Number: MFCD00003548
• Merck Index: 148627
• PubChem SID: 24863867; 24899676; 24884142; 24861785; 24858346; 24861783; 24861782; 24860739; 24848031; 24863863; 24863882; 24886361; 24886363; 24863872; 24886249; 24899784; 24860125; 24858422; 24861789; 24863885; 24866001; 24867285; 24886027; 24886357; 24899773; 24859171; 24871723; 24861788; 24862400; 24863870; 24859173; 24871931; 24861790; 24886248; 24845805; 24899528; 24884141; 24861796; 24845806; 24863865; 24861780; 24845831; 24858420; 24863880; 24886354; 24899535; 24861784; 24853242; 24858482; 24884084; 24859172; 24886026; 24863887; 24861107; 24861787; 162090965; 24845911; More...
• PubChem CID: 14798

CALCULATED PROPERTIES

• Acid pKa: 15.7
• H Acceptors: 1
• H Donor: 1
• LogD (pH = 5.5): -0.652
• LogD (pH = 7.4): -0.652
• Log P: -0.652
• Molar Refractivity: 13.9149 cm^3
• Polarizability: 1.1434737 Å^3
• Polar Surface Area: 0.0 Å^2
• Rotatable Bonds: 0
• Lipinski's Rule of Five: true

PROPERTIES

Physical Property

• Solubility: H2O: soluble1 M at 20 °C, clear, colorless; H2O: soluble1 M, clear, colorless; Soluble in water, alcohol and glycerol
• Apperance: beads; beads (small); flakes; Liquid; microprills; pellets; Pellets; pellets (anhydrous); powder; white pellets
• Melting Point: 318 °C; 318 °C(lit.); 318°C
• Boiling Point: 1390 °C at 1013 hPa; 1390°C
• Density: 1 g/mL at 25 °C; 1.01 g/mL at 25 °C; 1.02 g/mL at 25 °C; 1.04 g/mL at 25 °C; 1.182 g/mL at 25 °C; 1.327; 1.327 g/mL at 25 °C; 1.335 g/mL at 20 °C; 1.515 g/mL at 20 °C; 1.515 g/mL at 25 °C; 1.53; 2.13; 2.13 g/cm^3 at 25 °C
• Vapor Pressure: <18 mmHg ( 20 °C); 0 hPa at 20 °C; 3 mmHg ( 37 °C)
• Vapor Density: <1 (vs air); >1 (vs air)
• Absorption Wavelength: λ: 240 nm Amax: 0.17; λ: 260 nm Amax: ≤0.08; λ: 260 nm Amax: 0.015; λ: 260 nm Amax: 0.15; λ: 280 nm Amax: ≤0.05; λ: 280 nm Amax: 0.01; λ: 280 nm Amax: 0.08; λ: 300 nm Amax: 0.03; λ: 500 nm Amax: 0.02
• Conductivity: ~17.5 mS/cm at 20 °C
• Fluorescence: λex 200-600 nm; λem 300-800 nm (corresponds)

Safety Information

• Storage Condition: Room Temperature (15-30°C); Room Temperature (15-30°C), Desiccate
• Storage Warning: Air Sensitive & Hygroscopic
• RTECS: WB4900000
• European Hazard Symbols: Corrosive (C); Irritant (Xi)
• UN Number: 1823; 1824; UN1823; UN1824; UN3266
• German water hazard class: 1; nwg
• Hazard Class: 8
• Packing Group: 2; 3; II; III
• Australian Hazchem: 2X
• Risk Statements: 34; 35; 36/38; R:35
• Safety Statements: 23-26-36/37/39-45-60; 26; 26-36/37/39-45; 26-36/37/39-45-60; 26-37/39-45; S:26-45-37/39
• EU Classification: C10; C9
• EU Hazard Identification Number: 8B
• Emergency Response Guidebook(ERG) Number: 154
• TSCA Listed: 是
• GHS Pictograms: GHS05; GHS07
• GHS Signal Word: Danger; Warning
• GHS Hazard statements: H314; H314-H318; H315-H319
• GHS Precautionary statements: P260-P303+P361+P353-P305+P351+P338-P301+P330+P331-P405-P501A; P280-P305 + P351 + P338-P310; P305 + P351 + P338
• Personal Protective Equipment: Eyeshields, Faceshields, full-face particle respirator type N100 (US), Gloves, respirator cartridge type N100 (US), type P1 (EN143) respirator filter, type P3 (EN 143) respirator cartridges; Eyeshields, full-face respirator (US), Gloves, multi-purpose combination respirator cartridge (US), type ABEK (EN14387) respirator filter; Eyeshields, Gloves; Eyeshields, Gloves, half-mask respirator (US), multi-purpose combination respirator cartridge (US); Faceshields, full-face respirator (US), Gloves, Goggles, multi-purpose combination respirator cartridge (US), type ABEK (EN14387) respirator filter
• RID/ADR: UN 1823 8/PG 2; UN 1824 8/PG 2; UN 1824 8/PG 3
• Storage Temperature: room temp

Product Information

• Purity: ≥20%; ≥32%; ≥95.0%; ≥96.0%; ≥97.0%; ≥97.0% (T); ≥98%; ≥98% (acidimetric); ≥98.0% (T); ≥98.5%; 20% w/v aq. soln.; 25% w/v aq. soln.; 30% w/w aq. soln.; 40% w/v aq. soln.; 5% w/v aq. soln.; 50%; 50% (T); 50% w/w aq. soln.; 97%; 97.0% min; 98%; 98-100.5%; 99.99% trace metals basis; 99.995% trace metals basis
• Concentration: ~0.1 M NaOH; ~1.0 M NaOH; ≥30% in H2O; ≥30% in H2O (T); ≥32.0% in H2O (T); 0.01 M; 0.01 M NaOH (0.01 N); 0.01 M NaOH (0.01N); 0.02 M; 0.025 M NaOH (0.025N); 0.05 M; 0.05 M NaOH (0.05N); 0.0950-0.1050 N (Exact value stated on label); 0.1 M; 0.1 M NaOH (0.1 N); 0.1 M NaOH (0.1N); 0.1 M NaOH in H2O (0.1N); 0.111 M NaOH (0.111N); 0.1900-0.2100 N (Exact value stated on label); 0.2 M; 0.2 M NaOH (0.2N); 0.25 M; 0.25 M NaOH (0.25N); 0.28 M NaOH (0.28N); 0.4900-0.5100 N (Exact value stated on label); 0.5 M; 0.5 M NaOH (0.5 N); 0.5 M NaOH (0.5N); 0.950-1.050 N (Exact value stated on label); 1 M; 1 M NaOH (1N); 1 N; 1.0 M NaOH (1.0 N); 1.0 M NaOH (1.0N); 1.0 N; 1/10 N; 1/100 N; 1/2 N; 1/20 N; 1/5 N; 1/50 N; 10 M in H2O; 10.0 M NaOH (10.0N); 2 M; 2 M NaOH (2N); 2 N; 20 % (w/v); 4 M; 4 M NaOH (4N); 4 N; 4.900-5.100 N (Exact value stated on label); 5.0 M; 5.0 M NaOH (5.0N); 50% in H2O; 50-52% in H2O; 6 M; 6 N; 7 M; 7 N; 8 M NaOH (8N); 8%; 9.800-10.200 N (Exact value stated on label)
• Grade: ACS reagent; FIXANAL®; for analysis of acidity in milk; for determination of nitrogen; for HPCE; for HPLC; for luminescence; for molecular biology; for phosphorus determination in iron, for iron-works laboratories; for the manufacture of mirrors; JIS special grade; NF; Ph Eur; puriss.; puriss. p.a.; purum; purum p.a.; Reag. Ph. Eur.; reagent grade; SAJ first grade; semiconductor grade; TraceSELECT®
• Particle Size: 20-40 mesh
• Packaging: pkg of 0.01 mol (0.400 g NaOH); pkg of 0.025 mol (1.000 g NaOH); pkg of 0.1 mol (4.000 g NaOH); pkg of 0.2 mol (7.999 g NaOH); pkg of 0.25 mol (9.999 g NaOH); pkg of 0.5 mol (19.999 g NaOH); pkg of 1.0 mol (39.997 g NaOH); pkg of 10 mol (399.97 g NaOH); pkg of 148.3 mmol (1 ml = 0.01% phosphorus in 2 g of sample); pkg of 2.0 mol (79.994 g NaOH)
• Suitability: corresponds to standard for RP gradient test; in accordance for filter test (10% in H2O); in accordance for luminescence; suitable for amino acid analysis; suitable for cell culture
• Description: 40.0 g/L sodium hydroxide; for research or for further manufacturing use
• Impurities: <1% Na2CO3; ≤0.00001 g/mL Sodium carbonate; ≤0.00002 g/mL Sodium carbonate; ≤0.00004 g/mL Sodium carbonate; ≤0.0001% N; ≤0.0001% total nitrogen (N); ≤0.0003% total nitrogen (N); ≤0.0005% heavy metals (as Pb); ≤0.0005% Phosphorus (P); ≤0.0005% silicon dioxide (SiO2); ≤0.0005% total nitrogen (N); ≤0.001% heavy metals (as Pb); ≤0.001% N compounds; ≤0.001% silicon dioxide (SiO2); ≤0.002% heavy metals (as Pb); ≤0.01% ammonium hydroxide precipitate; ≤0.02% NH4OH ppt.; ≤0.1% Insoluble matter; ≤0.1% sodium carbonate (Na2CO3); ≤0.12 N Na2CO3; ≤0.5% Na2CO3; ≤0.5% sodium carbonate (Na2CO3); ≤0.8% sodium carbonate (Na2CO3); ≤1% Na2CO3; ≤1.0% Na2CO3; ≤1.0% sodium carbonate; ≤1.0% sodium carbonate (Na2CO3); ≤10 mg/kg heavy metals (as Ag); DNases, none detected; insoluble matter, passes filter test; phosphatases, none detected; proteases, none detected; RNases, none detected
• Cation Traces: Ag: ≤10 mg/kg; Ag: ≤5 mg/kg; Al: ≤0.0005%; Al: ≤10 mg/kg; Al: ≤2 mg/kg; Al: ≤20 μg/kg; Al: ≤5 mg/kg; As: ≤0.1 mg/kg; As: ≤1 mg/kg; As: ≤2 mg/kg; As: ≤5 μg/kg; Ba: ≤1 mg/kg; Ba: ≤200 μg/kg; Ba: ≤5 mg/kg; Bi: ≤1 mg/kg; Bi: ≤5 mg/kg; Ca: ≤0.0005%; Ca: ≤10 mg/kg; Ca: ≤100 μg/kg; Ca: ≤5 mg/kg; Ca: ≤50 mg/kg; Cd: ≤0.05 mg/kg; Cd: ≤1 mg/kg; Cd: ≤2 μg/kg; Cd: ≤5 mg/kg; Cd: ≤50 mg/kg; Ce: ≤5 μg/kg; Co: ≤1 mg/kg; Co: ≤2 μg/kg; Co: ≤5 mg/kg; Co: ≤50 mg/kg; Cr: ≤1 mg/kg; Cr: ≤10 μg/kg; Cr: ≤5 mg/kg; Cu: ≤0.0005%; Cu: ≤0.5 mg/kg; Cu: ≤1 mg/kg; Cu: ≤5 mg/kg; Cu: ≤5 μg/kg; Cu: ≤50 mg/kg; Eu: ≤5 μg/kg; Fe: ≤0.0005%; Fe: ≤0.001%; Fe: ≤1 mg/kg; Fe: ≤10 mg/kg; Fe: ≤10 μg/kg; Fe: ≤100 mg/kg; Fe: ≤20 mg/kg; Fe: ≤5 mg/kg; heavy metals (as Ag): ≤0.002%; Hg: ≤0.05 mg/kg; Hg: ≤0.1 mg/kg; Hg: ≤0.1 ppm; Hg: ≤1 mg/kg; Hg: ≤1 μg/kg; K: ≤0.02%; K: ≤100 mg/kg; K: ≤1000 mg/kg; K: ≤2 mg/kg; K: ≤200 mg/kg; K: ≤2000 μg/kg; K: ≤500 mg/kg; La: ≤5 μg/kg; Li: ≤1 mg/kg; Li: ≤200 μg/kg; Li: ≤5 mg/kg; Mg: ≤0.0005%; Mg: ≤1 mg/kg; Mg: ≤5 mg/kg; Mg: ≤50 μg/kg; Mn: ≤0.1 mg/kg; Mn: ≤1 mg/kg; Mn: ≤2 μg/kg; Mn: ≤5 mg/kg; Mo: ≤1 mg/kg; Mo: ≤5 mg/kg; Ni: ≤0.001%; Ni: ≤1 mg/kg; Ni: ≤10 mg/kg; Ni: ≤5 mg/kg; Ni: ≤5 μg/kg; Ni: ≤50 mg/kg; Pb: ≤0.001%; Pb: ≤0.1 mg/kg; Pb: ≤0.5 mg/kg; Pb: ≤1 mg/kg; Pb: ≤10 mg/kg; Pb: ≤10 μg/kg; Pb: ≤2 mg/kg; Pb: ≤5 mg/kg; Pb: ≤50 mg/kg; Sb: ≤10 μg/kg; Sc: ≤5 μg/kg; Se: ≤10 μg/kg; Sm: ≤5 μg/kg; Sr: ≤1 mg/kg; Sr: ≤100 μg/kg; Sr: ≤5 mg/kg; Tl: ≤5 mg/kg; Tl: ≤5 μg/kg; Y: ≤5 μg/kg; Yb: ≤5 μg/kg; Zn: ≤0.0005%; Zn: ≤0.2 mg/kg; Zn: ≤1 mg/kg; Zn: ≤10 μg/kg; Zn: ≤5 mg/kg; Zn: ≤50 mg/kg
• Antion Traces: bromide (Br-): ≤100 μg/kg; carbonate (as Na2CO3): ≤1%; carbonate (as Na2CO3): ≤1000 mg/kg; carbonate (as Na2CO3): ≤2%; chloride (Cl-): ≤0.005%; chloride (Cl-): ≤10 mg/kg; chloride (Cl-): ≤100 mg/kg; chloride (Cl-): ≤20 mg/kg; chloride (Cl-): ≤200 mg/kg; chloride (Cl-): ≤5 mg/kg; chloride (Cl-): ≤50 mg/kg; chloride (Cl-): ≤500 μg/kg; fluoride (F-): ≤100 μg/kg; nitrate (NO3-): ≤500 μg/kg; nitrite (NO2-): ≤100 μg/kg; phosphate (PO43-): ≤0.001%; phosphate (PO43-): ≤1 mg/kg; phosphate (PO43-): ≤10 mg/kg; phosphate (PO43-): ≤5 mg/kg; phosphate (PO43-): ≤50 μg/kg; silicate (as SiO2): ≤1 mg/kg; silicate (as SiO2): ≤10 mg/kg; silicate (as SiO2): ≤100 mg/kg; sulfate (SO42-): ≤0.003%; sulfate (SO42-): ≤0.05%; sulfate (SO42-): ≤10 mg/kg; sulfate (SO42-): ≤1000 μg/kg; sulfate (SO42-): ≤30 mg/kg; sulfate (SO42-): ≤5 mg/kg; sulfate (SO42-): ≤50 mg/kg; sulfate (SO42-): ≤500 mg/kg
• Sterility: sterile-filtered
• Shelf Life: (limited shelf life); (limited shelf life, expiry date on the label)
• Quality Level: PREMIUM
• Quality: for the determination of nitrogen; meets analytical specification of Ph. Eur., BP, NF, E524; purified; volumetric
• Factor: 1.000 ±0.001; 1.000 ±0.005; 1.000 ±0.1%at 20 °C; 1.000 ±0.2 R%; 1.000 ±0.2%
• λ: 1 M in H2O; in concentrate; neat
• Pharmacopeia: testing & handling conforms to Pharmacopeia
• Product Line: BioUltra
• abs.: UV absorption/200-800 nm in accordance
• calibrated against: potassium hydrogen phthalate
• Appearance: pellets; solution (volumetric)
• Linear Formula: NaOH

DETAILS

MP Biomedicals - 02199465

6.25N Solution

MP Biomedicals - 02153495

Anhydrous

Sigma Aldrich - S2770

Application
适于用作细胞培养应用的常规滴定碱。

Sigma Aldrich - 59223C

Preparation Note
Prepared with 40 g.L sodium hydroxide.

Sigma Aldrich - 656054

Packaging
6×1 L in poly bottle

Sigma Aldrich - 343110

General description
Visit our Titration Center to learn more.
Packaging
2 L in poly bottle
500 mL in poly bottle

Sigma Aldrich - 31086

General description
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Packaging
The suffix -VP or -VOLPAC in the product number indicates packaging in 5 or 10 L VOLPAC containers.

Sigma Aldrich - 72082

Preparation Note
prepared under clean room conditions and filtered through a 0.2 μm membrane filter

Sigma Aldrich - 38215

General description
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concentration after dilution to 1L: 1.0mol/L (1.0N); amount of substance 1.0mol (39.997 g NaOH)
Other Notes
This former Riedel-de-Haën product is now being offered as Fluka brand. During the transition, you still may receive the Riedel product. The rebranding has no impact on product performance or quality. For further information see www.sigma-aldrich.com/rebranding Printing link to product rebranding statementThe former Fluka product 1,4-Diisocyanatobutane is now being offered as Aldrich brand with the new product number 69006.

Sigma Aldrich - 319511

General description
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Packaging
500 mL in poly bottle
6×1, 2 L in poly bottle

Sigma Aldrich - 319481

General description
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Packaging
500, 6×500 mL in poly bottle
6×1, 2 L in poly bottle

Sigma Aldrich - 35261

General description
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Packaging
The suffix -VP or -VOLPAC in the product number indicates packaging in 5 or 10 L VOLPAC containers.

Sigma Aldrich - 35249

General description
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Sigma Aldrich - 43617

General description
This certified eluent concentrate for ion chromatography is traceable by potentiometric titration to NIST Standard Reference Material. It is certified in accordance with ISO Guide 31. All details about exact content, uncertainty, traceability and expiry date are described in the certificate.Download at: http://www.sigma-aldrich.com.
Preparation Note
Prepared with sodium hydroxide and high purity water (18.2 MΩ, 0.2 μm filtered)

Sigma Aldrich - 35257

General description
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Packaging
The suffix -VP or -VOLPAC in the product number indicates packaging in 5 or 10 L VOLPAC containers.

Sigma Aldrich - 34283

General description
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Sigma Aldrich - 71424

General description
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Sigma Aldrich - 71474

General description
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Sigma Aldrich - 35254

General description
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Sigma Aldrich - 38212

General description
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Sigma Aldrich - 32040

General description
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concentration after dilution to 1L: 0.25mol/L (0.25N); amount of substance 0.25mol (9.999 g NaOH)

Sigma Aldrich - 71463

General description
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Sigma Aldrich - 35263

General description
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Packaging
The suffix -VP or -VOLPAC in the product number indicates packaging in 5 or 10 L VOLPAC containers.

Sigma Aldrich - 38226

General description
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concentration after dilution to 1L: 0.025mol/L (0.025N); amount of substance 0.025mol (1.000 g NaOH)

Sigma Aldrich - 38210

General description
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concentration after dilution to 1L: 0.1mol/L (0.1N); amount of substance 0.1mol (4.000 g NaOH)

Sigma Aldrich - 72079

Preparation Note
prepared under clean room conditions and filtered through a 0.2 μm membrane filter

Sigma Aldrich - 38227

General description
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concentration after dilution to 1L: 0.01mol/L (0.01N); amount of substance 0.01mol (0.400 g NaOH)

Sigma Aldrich - 71395

General description
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Sigma Aldrich - 35274

General description
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Sigma Aldrich - 35262

General description
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Packaging
The suffix -VP or -VOLPAC in the product number indicates packaging in 5 or 10 L VOLPAC containers.

Sigma Aldrich - 35255

General description
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Sigma Aldrich - 656046

Packaging
6×1 L in poly bottle

Sigma Aldrich - 319503

General description
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Packaging
2 L in poly bottle
500 mL in poly bottle

Sigma Aldrich - 38217

General description
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concentration after dilution to 1L: 0.5mol/L (0.5N); amount of substance 0.5mol (19.999 g NaOH)

Sigma Aldrich - 71693

Other Notes
Sales restrictions may apply

Sigma Aldrich - 71535

General description
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Sigma Aldrich - 13171

Legal Information
TraceSELECT is a registered trademark of Sigma-Aldrich Co. LLC

Sigma Aldrich - 484024

Packaging
1 kg in poly bottle
10 kg in poly drum

Sigma Aldrich - 35260

Packaging
The suffix -VP or -VOLPAC in the product number indicates packaging in 5 or 10 L VOLPAC containers.

Sigma Aldrich - 38214

General description
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concentration after dilution to 10L: 1mol/L (1N); amount of substance 10mol (399.97 g NaOH)

Sigma Aldrich - 415413

Packaging
1 L in poly bottle
25, 100, 500 mL in poly bottle
4, 18 L in poly drum

Sigma Aldrich - 655104

Packaging
2.5 kg in poly bottle
25, 500 g in poly bottle

Sigma Aldrich - S5881

包装
1, 6×1 kg in glass bottle
散装
5 kg in poly drum
500 g in glass bottle

Sigma Aldrich - 71690

Other Notes
Reagent for the decomposition of silicates by fusion1,2

Sigma Aldrich - 221465

Packaging
12, 50 kg in poly drum
25, 500, 6×500 g in poly bottle
2.5 kg in poly bottle

Sigma Aldrich - 38218

Legal Information
FIXANAL is a registered trademark of Sigma-Aldrich Laborchemikalien GmbH

Sigma Aldrich - 367176

Packaging
12 kg in poly drum
500 g in poly bottle
2.5 kg in poly bottle

Sigma Aldrich - 306576

Packaging
25, 100, 500 g in poly bottle

Sigma Aldrich - 35256

General description
Visit our Titration Center to learn more.
Packaging
The suffix -VP or -VOLPAC in the product number indicates packaging in 5 or 10 L VOLPAC containers.

Sigma Aldrich - 33337

Packaging
The suffix -VP or -VOLPAC in the product number indicates packaging in 5 or 10 L VOLPAC containers.

Sigma Aldrich - 32041

General description
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concentration after dilution to 1L: 0.2mol/L (0.2N); amount of substance 0.2mol (7.999 g NaOH)