Sodium hypochlorite pentahydrate

CAS NO.：10022-70-5
Empirical Formula: NaClO.5H2O
Molecular Weight: 165.53
MDL number: MFCD01941504
SAFETY DATA SHEET (SDS)
Update Date: 2026-04-24 14:58:30

What is Sodium hypochlorite pentahydrate?

Description

Sodium hypochlorite pentahydrate crystals are an excellent alternative to traditional sodium hypochlorite solutions.

Chemical properties

Pale yellow crystals.

The Uses of Sodium hypochlorite pentahydrate

Individual sodium hypochlorite pentahydrate crystals (without nitro radicals) exhibit a strong oxidizing power, converting secondary alcohols to the corresponding ketones for industrial and laboratory use.

Definition

ChEBI:Sodium hypochlorite pentahydrate is a hydrate consisting of sodium hypochlorite and 5 molar equivalents of water.

Synthesis

The high concentration Sodium hypochlorite solution was prepared by passing chlorine gas into 45~48% Sodium hydroxide solution, filtering to remove the precipitated Sodium chloride, and cooling the filtrate to about 15℃, Sodium hypochlorite pentahydrate crystals were precipitated, and the product was obtained by centrifugal filtration.

Synthesis of Sodium hypochlorite pentahydrate

Solubility in organics

Insoluble

Properties of Sodium hypochlorite pentahydrate

Melting point:	18°C
Density	1.600
Water Solubility	Completely soluble in water
solubility	Methanol (Slightly), Water (Slightly)
form	pale green orthorhombic crystals
color	Light yellow to Yellow to Orange
EPA Substance Registry System	Sodium hypochlorite pentahydrate (10022-70-5)

Safety information for Sodium hypochlorite pentahydrate

Signal word	Danger
Pictogram(s)	Flame Over Circle Oxidizers GHS03 Corrosion Corrosives GHS05 Environment GHS09
GHS Hazard Statements	H272:Oxidising liquids;Oxidising solids H290:Corrosive to Metals H314:Skin corrosion/irritation H410:Hazardous to the aquatic environment, long-term hazard
Precautionary Statement Codes	P210:Keep away from heat/sparks/open flames/hot surfaces. — No smoking. P220:Keep/Store away from clothing/…/combustible materials. P221:Take any precaution to avoid mixing with combustibles/… P234:Keep only in original container. P260:Do not breathe dust/fume/gas/mist/vapours/spray. P264:Wash hands thoroughly after handling. P264:Wash skin thouroughly after handling. P273:Avoid release to the environment. P280:Wear protective gloves/protective clothing/eye protection/face protection. P363:Wash contaminated clothing before reuse. P390:Absorb spillage to prevent material damage. P391:Collect spillage. Hazardous to the aquatic environment P301+P330+P331:IF SWALLOWED: Rinse mouth. Do NOT induce vomiting. P303+P361+P353:IF ON SKIN (or hair): Remove/Take off Immediately all contaminated clothing. Rinse SKIN with water/shower. P370+P378:In case of fire: Use … for extinction. P405:Store locked up. P406:Store in corrosive resistant/… container with a resistant inner liner.