Sodium percarbonate Property

Density 

2.09[at 20℃]

vapor pressure 

< 10-3 Pa at 25°C

form 

Granular Powder

color 

White

PH

About 10.5 at 1% concentration (20°C)

Odor

Odorless

Water Solubility 

Soluble in water.

Sensitive 

Moisture Sensitive

Decomposition 

> 131 °F (> 55 °C)

LogP

-0.809 (est)

CAS DataBase Reference

15630-89-4(CAS DataBase Reference)

EPA Substance Registry System

Sodium percarbonate (15630-89-4)

Safety

Hazard Codes 

O,Xn

Risk Statements 

8-22-41-36/38

Safety Statements 

17-26-39-37/39

RIDADR 

UN 1479 5.1/PG 3

WGK Germany 

1

RTECS 

FG0750000

F 

21

TSCA 

Yes

HazardClass 

5.1

PackingGroup 

II

HS Code 

28369990

Hazardous Substances Data

15630-89-4(Hazardous Substances Data)

Toxicity

mouse,LD50,oral,2200mg/kg (2200mg/kg),BEHAVIORAL: SOMNOLENCE (GENERAL DEPRESSED ACTIVITY)LUNGS, THORAX, OR RESPIRATION: DYSPNEA,Toksikologicheskii Vestnik. Vol. (3), Pg. 46, 1994.

Hazard and Precautionary Statements (GHS)

Symbol(GHS)

Signal word

Danger

Hazard statements

H272May intensify fire; oxidizer

H302Harmful if swallowed

H318Causes serious eye damage

Precautionary statements

P210Keep away from heat/sparks/open flames/hot surfaces. — No smoking.

P220Keep/Store away from clothing/…/combustible materials.

P264Wash hands thoroughly after handling.

P264Wash skin thouroughly after handling.

P280Wear protective gloves/protective clothing/eye protection/face protection.

P301+P312IF SWALLOWED: call a POISON CENTER or doctor/physician IF you feel unwell.

P305+P351+P338IF IN EYES: Rinse cautiously with water for several minutes. Remove contact lenses, if present and easy to do. Continuerinsing.

Sodium percarbonate Chemical Properties,Usage,Production

Chemical Properties

Sodium percarbonate is a white granular powder of sodium carbonate and hydrogen peroxide.

Sodium percarbonate is mainly used as a bleaching chemical in laundry detergents (tablets, compact or regular powders), laundry additives and machine dishwashing products. It is an oxidizing agent and ingredient in a number of home and laundry cleaning products, including eco-friendly bleach products such as OxiClean and Tide laundry detergent. Dissolved in water, it releases hydrogen peroxide and soda ash (sodium carbonate):
2(Na2CO31.5H202)→2Na2CO3+3H202

Uses

Sodium percarbonate is used as an oxidizing agent and environmentally friendly bleaching agent. It is used as a laboratory source of anhydrous hydrogen peroxide. It is utilized for the preparation of optically active 4-hydroxy-2-isoxazolines. It is widely used in detergent formulations and cleaning products such as carpet cleaner, textile bleach, denture cleaners, pulp and paper bleaching processes. It is also used as a hard filth removing agent in electroplating, waste water treatment agent and polymerization control agent. Further, it finds application in furniture polish and cleaners and personal care formulations. In addition to this, it is used in the preparation of trimethyl cyclopentenyl acetaldehyde and epoxydihydrolinalool.

Uses

Sodium percarbonate is an addition salt of hydrogen peroxide and sodium carbonate that provides a solid source of hydrogen peroxide. When dissolved in water, sodium percarbonate liberates hydrogen peroxide. Sodium percarbonate is a white, granular or powdered solid oxidizer. It is used primarily as a bleaching agent in cleaning products. Other uses include algaecides, fungicides, chemical synthesis and environmental applications such as control of odor at waste treatment facilities. A small amount is used in denture cleaners and toothpaste.
Multifunctional reagent for the preparation of optically active 4-hydroxy-2-isoxazolines.

Preparation

Sodium percarbonate is produced by the reaction of sodium carbonate with hydrogen peroxide, which can be done via dry, spray and wet processes. In the dry process aqueous hydrogen peroxide solution is sprayed on solid sodium carbonate; a solid-liquid reaction yields sodium percarbonate. In the spray process sodium percarbonate is produced by a fluid bed process. Solutions of sodium carbonate and hydrogen peroxide are sprayed into a drying chamber where the water is evaporated. In the wet process sodium percarbonate is usually prepared by cristallisation possibly in combination with salting out.

Reactions

Sodium percarbonate naturally decomposes, very slowly, to form sodium carbonate and hydrogen peroxide. The hydrogen peroxide may further decompose to form water and oxygen and liberate some heat. The decomposition proceeds according to the reaction below:
2Na2CO3 • 3H2O2 → 2Na2CO3 + 3H2O + 1.5 O2 + Heat

General Description

A colorless, crystalline solid. Denser than water. May combust in contact with organic materials. Contact may irritate skin, eyes and mucous membranes. May be toxic by ingestion. Used to make other chemicals.

Air & Water Reactions

Soluble in water.

Reactivity Profile

Oxidizing agents, such as SODIUM PERCARBONATE, can react with reducing agents to generate heat and products that may be gaseous (causing pressurization of closed containers). The products may themselves be capable of further reactions (such as combustion in the air). The chemical reduction of materials in this group can be rapid or even explosive, but often requires initiation (heat, spark, catalyst, addition of a solvent). Explosive mixtures of inorganic oxidizing agents with reducing agents often persist unchanged for long periods if initiation is prevented. Such systems are typically mixtures of solids, but may involve any combination of physical states. Some inorganic oxidizing agents are salts of metals that are soluble in water; dissolution dilutes but does not nullify the oxidizing power of such materials. Organic compounds, in general, have some reducing power and can in principle react with compounds in this class. Actual reactivity varies greatly with the identity of the organic compound. Inorganic oxidizing agents can react violently with active metals, cyanides, esters, and thiocyanates.

Health Hazard

Inhalation, ingestion or contact (skin, eyes) with vapors or substance may cause severe injury, burns or death. Fire may produce irritating, corrosive and/or toxic gases. Runoff from fire control or dilution water may cause pollution.

Fire Hazard

These substances will accelerate burning when involved in a fire. Some may decompose explosively when heated or involved in a fire. May explode from heat or contamination. Some will react explosively with hydrocarbons (fuels). May ignite combustibles (wood, paper, oil, clothing, etc.). Containers may explode when heated. Runoff may create fire or explosion hazard.

Safety Profile

Moderately toxic by ingestion. When heated to decomposition it emits acrid smoke and irritating vapors

Synthesis

Sodium percarbonate is prepared by the reaction of dihydrogen peroxide and sodium carbonate. The specific synthesis steps are as follows:
With florisil In water addn. of small amounts of MgSiO3 and water glass to 500kg H2O2 (dild. to 20% soln.), addn. of 1051kg Na2CO3 at 18°C, cooling to 5°C, cooling to -4°C after addn. of 500kg NaCl; centrifugation, drying, reuse of mother-liquor, finally sodium percarbonate (yield: 85.5%) is obtained.

Environmental Fate

Sodium percarbonate is not persistent in the environment and readily decomposes to soda ash (sodium carbonate) and hydrogen peroxide which will subsequently decompose to water and oxygen when exposed to soils, sediments, and surface or ground waters.

Toxicity evaluation

Sodium percarbonate has a low acute toxicity via the oral and dermal route (LD50 > 1000 mg/kg body weight). The existing animal data on acute toxicity show that sodium percarbonate has a local effect. In animal tests a slight irritating effect on the skin was reported for solid sodium percarbonate and it was highly irritating to the rabbit eye (not rinsed). Sodium percarbonate did not have sensitising properties in a test with guinea pigs.