Product Description of Caustic Soda (CAS 1310-73-2)
Sodium Hydroxide (NaOH), commonly known as Caustic Soda, is one of the most widely used and versatile industrial chemicals. It typically appears as white flake or granular. As a strong base, it is highly corrosive and dissolves readily in water and alcohols, creating a strongly alkaline solutions. Its hygroscopic properties allow it to absorb moisture, as well as carbon dioxide, from the surrounding environment. From large-scale textiles and wood pulp paper manufacturing to soap production and the household drain cleaning, Sodium Hydroxide remains an essential staple in modern industrial chemistry.
Chemical Properties
| Melting point | 681 °C(lit.) |
| Boiling point | 1390°C |
| density | 1.515 g/mL at 20 °C |
| vapor density | <1 (vs air) |
| vapor pressure | 1 mm Hg ( 745 °C) |
| refractive index | 1,473-1,475 |
| Fp | 176-178°C |
| storage temp. | room temp |
| solubility | H2O: 1 M at 20 °C, clear, colorless |
| form | beads |
| color | White |
| Specific Gravity | 2.13 |
| PH Range | 13 - 14 |
| PH | 10.98(1 mM solution);11.95(10 mM solution);12.88(100 mM solution); |
| Odor | Odorless |
| Water Solubility | SOLUBLE |
| λmax | λ: 260 nm Amax: 0.015 λ: 280 nm Amax: 0.01 |
| Decomposition | 176-178 ºC |
| Sensitive | Air Sensitive & Hygroscopic |
| Merck | 14,8627 |
| Dielectric constant | 57.5（25℃） |
| Exposure limits | TLV-TWA air 2 mg/m3 (OSHA); ceiling 2 mg/m3 (ACGIH) and 2 mg/m3/15 min (NIOSH). |
| Stability: | hygroscopic |
| CAS DataBase Reference | 1310-73-2(CAS DataBase Reference) |
| NIST Chemistry Reference | Sodium hydroxide(1310-73-2) |
| EPA Substance Registry System | Sodium hydroxide (1310-73-2) |
Safety Information
| Hazard Codes | C,Xi |
| Risk Statements | 36/38-35-34 |
| Safety Statements | 26-45-37/39-24/25-36/37/39 |
| RIDADR | UN 1824 8/PG 2 |
| OEL | Ceiling: 2 mg/m3 |
| WGK Germany | 1 |
| RTECS | TT2975000 |
| F | 8 |
| TSCA | Yes |
| HS Code | 2815 11 00 |
| HazardClass | 8 |
| PackingGroup | II |
| Hazardous Substances Data | 1310-73-2(Hazardous Substances Data) |
| Toxicity | LD orally in rabbits: 500 mg/kg (10% soln) (Fazekas) |
| IDLA | 10 mg/m3 |
Product Applications
As an industrial alkali in high demand, sodium hydroxide remains a vital component of modern manufacturing in 2026. Its applications span a wide spectrum—from advanced pharmaceutical synthesis and metallurgy to traditional sectors like soap production and textile manufacturing. Whether serving as a key reactant in organic chemistry or a catalyst in metal smelting, its combination of stability and high reactivity is virtually unmatched.
We offer specialized grades tailored to specific regulatory requirements, ensuring that your production lines—from precious metal processing to food-grade applications—fully comply with the highest national standards (the GB series).
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