اسید سولفوریک 70%
| Formula: | H2O4S |
| Chemical formula: | H2SO4 |
| Density: | 1.61 g/cm3 (20 °C) |
| Molar mass: | 98.08 g/mol |
| CAS number: | 7664-93-9 |
| EC index number: | 016-020-00-8 |
| HS code: | 28070010 |
| EC number: | 231-639-5 |
| Storage (temperature): | Without limitations. |
| SDS | available |
| RTECS: | WS5600000 |
| R phrase: | R 35 |
| S phrase: | S 26-30-45 |
| Odour: | odourless |
| Form: | liquid |
| Color: | colourless |
| PH value: | 0.3 (49 g/l 25 °C) |
| Solubility in water: | (20˚C) soluble, |
| Solubility in ethanol: | soluble, |
| Boiling point: | ~ 335 °C |
| Melting point: | ~ 3 °C |
| Vapour pressure: | ~ 0.0001 hpa (20 °C) |
| Thermal decomposition: | ~ 338 °C |
| Viscosity dynamical | ~ 24 mPa*s (20 °C) |
| Assay | ≥ | 70.0 | % |
| Description | Conforms | ||
| Solubility | Conforms | ||
| Identification | Conforms | ||
| Chloride | ≤ | 0.005 | % |
| Heavy metals | ≤ | 5.0 | ppm |
| Residue on ignition | ≤ | 0.005 | % |
| Reducing Substances | Conforms |
Sulfuric acid 70% is a strong mineral acid in aqueous solution, widely used in chemical manufacturing, industrial processes, and laboratories.
🏭⚗️ Production
Industrial sulfuric acid is produced via the Contact Process, where sulfur dioxide (SO₂) is oxidized to sulfur trioxide (SO₃), then absorbed in water. The 70% concentration is prepared by carefully diluting concentrated sulfuric acid (typically ~98%) with water under controlled conditions due to its highly exothermic nature.
🔬 Properties
Sulfuric acid 70% is a clear, oily, colorless to slightly yellow liquid with strong corrosive and dehydrating properties. Its chemical formula is H₂SO₄, and the 70% solution is strongly acidic with a density of ~1.57 g/cm³. It reacts violently with water, metals, and organic compounds.
🧪 Applications
Used in battery acid, fertilizer production, mineral processing, and chemical synthesis. Also found in pH adjustment, cleaning agents, and lab protocols requiring strong acidity or dehydration.
⚠️ Safety
Sulfuric acid 70% is highly corrosive and dangerous. It causes severe burns on skin and eyes and can damage the respiratory tract if inhaled. Always add acid to water (never the reverse) when diluting. Use protective gloves, goggles, and acid-resistant containers. Store in a cool, ventilated area away from organic materials and bases.
