Sodium Hypochlorite CAS#7681-52-9
Effective Disinfectant and Bleaching Agent: Sodium hypochlorite is widely used for its powerful disinfecting and bleaching properties in water treatment, sanitation, and cleaning.
Versatility in Applications: Available in different concentrations, it is suitable for both household and industrial uses, with household bleach containing around 5.25% NaOCl and industrial-grade bleach around 15%.
Solubility and Storage: It is easily soluble in water and has a unique ability to decompose when exposed to warm temperatures, necessitating careful storage in cool, opaque containers to maintain its effectiveness.
Economic and Accessible: Sodium hypochlorite is cost-effective and readily available, making it a popular choice for disinfection and bleaching across various sectors, despite its limited shelf life.
Sodium hypochlorite (NaOCl) is an air-sensitive, pale crystalline compound that is readily soluble in water but decomposes when exposed to warm temperatures. It is characterized by a distinct, candy-like aroma in its diluted form. Commonly available in two strengths, household bleach typically contains about 5.25 wt% NaOCl, while industrial-grade bleach—often referred to as 15% bleach—contains approximately 150 g/L of available chlorine. According to multiple sources, sodium hypochlorite is widely used as a disinfectant and bleaching agent in water treatment, sanitation, and various cleaning applications.
Its instability in air and warm water necessitates careful storage in opaque, cool containers to preserve its efficacy. Despite its tendency to decompose over time, it remains a versatile and critical compound in both residential and industrial sectors.
Parameters
Melting point | -16 °C |
Boiling point | 111 °C |
density | 1.25 g/mL at 20 °C |
vapor pressure | 17.5 mmHg ( 20 °C) |
refractive index | 1.3870 |
storage temp. | 2-8°C |
solubility | Methanol (Slightly), Water (Slightly) |
form | Solution |
color | Light yellow |
Specific Gravity | 1.209 |
Odor | pale greenish to yel. liq., chlorine bleach odor |
PH | 12-13 (20°C, 68 °F) |
Water Solubility | decomposes. |
Merck | 14,8628 |
Dielectric constant | 6.7（Ambient） |
Exposure limits | ACGIH: Ceiling 2 mg/m3 |
BCS Class | 1 |
Stability: | Stable. Contact with acids releases poisonous gas ( chlorine ). Light sensitive. Incompatible with strong acids, amines, ammonia, ammonium salts, reducing agents, metals, aziridine, methanol, formic acid, phenylacetonitrile. |
LogP | -3.42 at 20℃ |
CAS DataBase Reference | 7681-52-9(CAS DataBase Reference) |
EPA Substance Registry System | Sodium hypochlorite (7681-52-9) |
Safety Information
Hazard Codes | C,Xi,N |
Risk Statements | 31-34-36/38-36/37/38-50 |
Safety Statements | 26-36/37/39-45-50A-28A-36-61-50-28 |
RIDADR | UN 1791 8/PG 3 |
WGK Germany | 2 |
RTECS | NH3486300 |
TSCA | Yes |
HazardClass | 8 |
PackingGroup | III |
HS Code | 28289000 |
Hazardous Substances Data | 7681-52-9(Hazardous Substances Data) |
Toxicity | Skin contact with the solid hypochlorite pentahydrate or its concentrated solution can cause irritation. Ingestion may cause corrosion of mucous membranes and gastric perforation. |
