Caustic Soda 99% white

Sodium hydroxide

Aetznatron;Augus hot rod;causticflake;causticsoda,bead;causticsoda,bead(dot);hydroxydedesodium(solide);hydroxydedesodium(solutions);SODIUM HYDROXIDE SOLUTION, 50% W/W, REAGENT GRADESODIUM HYDROXIDE SOLUTION, 50% W/W, REAGENT GRADESODIUM HYDROXIDE SOLUTION, 50% W/W, REAGENT GRADESODIUM HYDROXIDE SOLUTION, 50% W/W, REAGENT GRADE

1310-73-2

NaOH

HEMHJVSKTPXQMS-UHFFFAOYSA-M

39.99711

215-185-5

TSCA listed

White

2815 11 00

Organic Reagents

λ: 260 nm Amax: 0.015λ: 280 nm Amax: 0.01

White orthorhombic crystals, produced in the form of pellets, lumps, sticks, beads, chips, flakes or solutions; hygroscopic; very corrosive; rapidly absorbs CO2 and water from the air; density 2.13 g/cm3; melts at 323°C; vaporizes at 1388°C; vapor pressure 1 torr at 739°C and 5 torr at 843°C; very soluble in water (110 g/100mL at room temperature), generating heat on dissolution; aqueous solutions highly alkaline, pH of 0.5% solution about 13 and 0.05% solution about 12; soluble in methanol, ethanol and glycerol (23.8 g/100 mL methanol and 13.9 g/100 mL ethanol at ambient temperatures.).

1.515 g/mL at 20 °C

681 °C(lit.)

1390°C

1,473-1,475

SOLUBLE

1 mm Hg ( 745 °C)

<1 (vs air)

LD orally in rabbits: 500 mg/kg (10% soln) (Fazekas)

Sodium hydroxide and potassium hydroxide are not flammable as solids or aqueous solutions.

Odorless

10.98(1 mM solution);11.95(10 mM solution);12.88(100 mM solution);

Soluble in water. Dissolution can liberate enough heat to cause steaming and spattering and ignite adjacent combustible material [Haz. Chem. Data 1966].

CAUSTIC SODA (Sodium hydroxide) is a strong base. Reacts rapidly and exothermically with acids, both organic and inorganic. Readily absorbs moisture from the air to give caustic semi-solids that attack aluminum and zinc with the evolution of flammable hydrogen gas. Catalyzes the polymerization of acetaldehyde and other polymerizable compounds; these reactions can occur violently, for example, acrolein polymerizes with extreme violence when put in contact with alkaline materials such as sodium hydroxide [Chem. Safety Data Sheet SD-85 1961]. Reacts with great violence with phosphorus pentaoxide when initiated by local heating [Mellor 8 Supp.3:406 1971]. Contact (as a drying agent) with tetrahydrofuran, which often contains peroxides, may be hazardous---explosions have occurred in such a use of the chemically similar potassium hydroxide [NSC Newsletter Chem. Soc. 1967]. Mixing with any of the following substances in a closed container caused the temperature and pressure to increase: glacial acetic acid, acetic anhydride, acrolein, chlorohydrin, chlorosulfonic acid, ethylene cyanohydrin, glyoxal, hydrochloric acid (36%), hydrofluoric acid (48.7%), nitric acid (70%), oleum, propiolactone, sulfuric acid (96%) [NFPA 1991]. Accidental contact between a caustic cleaning solution (probably containing sodium hydroxide) and Pentol caused a violent explosion. [MCA Case History 363(1964)]. Heating with a mixture of methyl alcohol and trichlorobenzene during an attempted synthesis led to a sudden increase in pressure and an explosion [MCA Guide for Safety Appendix 3 1972]. Hot and/or concentrated NaOH can cause hydroquinone to decompose exothermically at elevated temperature. (NFPA Pub. 491M, 1975, 385)

room temp