Shangyuchem FAQ-Technical information, Formulation guides, Application tips

Sodium percarbonate (or sodium carbonate peroxyhydrate) is an addition compound of sodium carbonate and hydrogen peroxide. When dissolved into water, its releases H2O2 and soda ash (sodium carbonate).
2Na2CO3 . 3H2O2 ---> 2Na2CO3 + 3H2O2
The pH of the resulting solution is typically alkaline, which activates the H2O2 for bleaching. The dry powder contains about 30% w/w H2O2.

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2. What are the applications of sodium percarbonate?

Sodium percrabonate has a wide range of applications in various solid detergent products and all fabric bleaches. We may also find its usages in oxygen release compositions, personal care formulations, disinfectants, food bleaches, pulp and paper bleaches and textile bleaches, etc.

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3. What are the advantages of sodium percarbonate?

Compared with chlorine bleaching chemicals that have contaminations on the environment, sodium percarbonate is an environmentally friendly chemical which decomposes into oxygen, water and natural soda ash when in contact with hydrous media.
Sodium percarbonate is increasingly being the substitute for sodium perborate in detergent formulations due to its lower dissolving temperature in water, as well as the characteristic of no contamination on soil, as sodium perborate is made of borax which is found to have negative impact on the soil quality.
Detergent or bleach compositions formulated with sodium percarbonate have an strong stain removal capability. It is very effective as a laundry presoak for heavily stained articles. It is color safe. It brightens colors and prevent fabric form become yellowed or darkened.
Sodium percarbonate is effective as a disinfectant on both bacteria and virus. It’s an excellent ingredient in personal care and home care formulations for hygiene.
For its environmental advantages, sodium percarbonate is a good oxygen release chemical for agricultural and aquicultural applications.

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4. Why is Shangyuchem believed to be a reliable supplier of sodium percarbonate in the world market?

Shangyuchem has been producing sodium percarbonate for more than a decade. Due to its abundant R & D investment and tech innovation, Shangyuchem is able to provide its customers with different specs of quality coated and uncoated sodium percarbonate. Shangyuchem currently has a production capability of 100,000mt annually which can meet customers’ increasing demands on a sustainable base. You’ll feel satisfied with the cooperation with Shangyuchem not only for the reason of good product quality, timely and safe delivery, but also the excellent after market service and tech support.
Shangyuchem runs its business on the base of honesty and integrity, Shangyuchem is fully participated in meeting customers’ demands.

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5. What’s the difference between the coated and uncoated sodium percarbonate?

Sodium percarbonate is used as an active oxygen component in detergents, bleaches and cleaning agents. Due to the unsatisfactory storage stability of the uncoated sodium percarbonate in warm/moist surroundings and in the presence of certain detergent and cleaning agent components, sodium percarbonate must be stabilized against the loss of active oxygen. An essential principle of stabilization involves encasing the sodium percarbonate particles in a coating of components having a stabilizing action. Here comes the definetion: the coated sodium percarbonate is the sodium percarbonate crystals coated with single or multiple layers of various substances in order to increase active oxygen stability and optimize storage and ensiling properties.
Coated sodium percarbonate is the more commonly commercialized peroxide compared with the uncoated sodium percarbonate. But the uncoated product is still the preferred ingredient for simply mixing with enough quantity of soda ash and some surfactants to form the popular oxygen bleaches.

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6. How to make PCS based oxygen bleach system stable in powder detergent formulations?

Detergent compositions containing sodium percarbonate are known in the art. Sodium percarbonate is an attractive perhydrate for use in detergent compositions because it dissolves readily in water, is weight efficient and, after giving up its available oxygen, provides a useful source of carbonate ions for detergency purposes.
However, the inclusion of percarbonate salts in detergent compositions has been restricted by the relative instability of the bleach both as is and in use. Sodium percarbonate loses its available oxygen at a significant rate in the presence of ions of heavy metals such as iron, copper and manganese and also in the presence of moisture, these effects being accelerated at temperatures in excess of about 30.degree. C. To solve this problem, several solutions have been found.
1, Sodium percarbonate is coated with a hydrophobic substance or the like.
2, Magnesium silicate is incorporated in a detergent composition containing sodium percarbonate.
3, A chelating agent which forms an easily water-soluble metal chelated compound such as nitrilotriacetate (NTA) or ethylene diamine tetraacetate (EDTA) is incorporated in a detergent composition.
4, Zeolite A is replaced by maximum aluminium zeolite P (zeolite MAP) since zeolite MAP itself is of greater liquid carrying capacity than zeolite A.
5,The elimination of impurities, such as heavy metals which catalyze the decomposition reaction during detergent processing, alleviates the instability of aqueous SCP solutions.
6, Provide sufficient sodium carbonate in the composition to be able to combine with all of the available water in the composition to form sodium carbonate monohydrate. the term "available water" includes water chemically available as hydrogen peroxide, water of crystallization of sodium carbonate hydrates and free water which may temporarily exist in the composition.

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7. What's the amount of sodium percarbonate to be formulated in bleach and detergent compositions?

Oxygen Bleach Type	Ingredients	% By WT.
Home Laundry Bleach Premium Grade	Sodium Percarbonate	25.0
	Soda Ash	50.0
	Nonionic Surfactant	3.0
	Sodium Sulfate	22.0
	Total	100.0
Home Laundry Bleach Economy Grade	Sodium Percarbonate	25.0
	Soda Ash	75.0
	Total	100.0
Home Laundry Bleach Concentrated Grade	Sodium Percarbonate	80.0
	Soda Ash	20.0
	Total	100.0
Institutional Laundry Bleach	Sodium Percarbonate	80.0
	Soda Ash	20.0
	Total	100.0
Concrete Cleaner	Sodium Percarbonate	78.0
	Soda Ash	20.0
	Nonionic Surfactant	2.0
	Total	100.0
Vinyl Siding Cleaner	Sodium Percarbonate	28.0
	Soda Ash	72.0
	Total	100.0
Wood Deck Cleaner and Stain Remover	Sodium Percarbonate	80.0
	Soda Ash	10.0
	Sodium Tripolyphosphate	10.0
	Total	100.0
Marine Teak Cleaner	Sodium Percarbonate	58.0
	Soda Ash	40.0
	Nonionic Surfactant	2.0
	Total	100.0

Powder dertergents	Ingredients	% By WT.
Standard detergent base PCS(8~15%, by WT.)	Sodium Percarbonate	12.5
	Soda Ash	16.4
	Nonionic Surfactant	4.1
	Linear alkylbenzene sulphonate	9.0
	Zeolite MAP (as anhydrous)	37.7
	Acrylic/maleic copolymer	4.0
	Sodium alk