484024

Sodium hydroxide

reagent grade, 97%, flakes

• Synonym(s): ‘Caustic soda’
• Linear Formula: NaOH
• CAS Number: 1310-73-2
• Molecular Weight: 40.00
• EC Number: 215-185-5
• MDL number: MFCD00003548
• UNSPSC Code: 12352316
• PubChem Substance ID: 329757371
• NACRES: NA.21

Properties

• grade: reagent grade
• Quality Level: 100
• Agency: suitable for DIN 38407-42; suitable for EPA 533; suitable for EPA 8327; suitable for EPA OTM-45
• vapor density: >1 (vs air)
• vapor pressure: <18 mmHg ( 20 °C); 3 mmHg ( 37 °C)
• Assay: 97%
• form: flakes
• technique(s): titration: suitable
• mp: 318 °C (lit.)
• solubility: water: soluble 1260 g/L at 20 °C
• density: 2.13 g/cm³
• application(s): PFAS testing
• SMILES string: [OH-].[Na+]
• InChI: 1S/Na.H2O/h;1H2/q+1;/p-1
• InChI key: HEMHJVSKTPXQMS-UHFFFAOYSA-M

Description

General description

Sodium hydroxide also known as caustic soda is a water soluble base with a wide range of industrial applications. Purification of diatomite with NaOH enhances its ability to adsorb basic dyes.[1] NaOH when coupled with thermal desorption is reported to improve the degradation of polychlorinated biphenyl (PCB) in PCB contaminated soil.[2] The efficiency of the aqueous solution of sodium citrate (Na₃Ci) and sodium hydroxide (NaOH) to dissolve SO₂ has been investigated.[3]

Application

Sodium hydroxide (NaOH) has been used to trap the hydrogen bromide gas released during the photo-bromination of 4-nitro-o-xylene.[2]
It may be used in the following processes:

• Boehm′s titration[4]
• dissolution testing[5]
• pH adjustment during the silver nanoparticles synthesis[6]

Safety Information

• Pictograms: GHS05
• Signal Word: Danger
• Hazard Statements: H290,H314
• Precautionary Statements: P234 - P260 - P280 - P303 + P361 + P353 - P304 + P340 + P310 - P305 + P351 + P338
• Hazard Classifications: Eye Dam. 1 - Met. Corr. 1 - Skin Corr. 1A
• Storage Class Code: 8B - Non-combustible corrosive hazardous materials
• WGK: WGK 1
• Flash Point(F): Not applicable
• Flash Point(C): Not applicable