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
• 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. NaOH when coupled with thermal desorption is reported to improve the degradation of polychlorinated biphenyl (PCB) in PCB contaminated soil. The efficiency of the aqueous solution of sodium citrate (Na₃Ci) and sodium hydroxide (NaOH) to dissolve SO₂ has been investigated.

Application

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

• Boehm′s titration
• dissolution testing
• pH adjustment during the silver nanoparticles synthesis

Safety Information

• pictograms: GHS05
• signalword: Danger
• hcodes: H290 - H314
• pcodes: 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: 8B - Non-combustible, corrosive hazardous materials
• wgk_germany: WGK 1
• flash_point_f: Not applicable
• flash_point_c: Not applicable