Trisodium Phosphate, TSP, ไตรโซเดียมฟอสเฟต, ไตรโซเดียมฟอสเฟท, ทีเอสพี
ไตรโซเดียม ฟอสเฟท (Tri Sodium Phosphate) เป็นสารบัฟเฟอร์ที่เป็นด่างอย่างแก่
ทำงานเป็น Emulsifier เพื่อปรับปรุงเนื้อสัมผัสรักษาความหนืด
และป้องกันการแยกตัวของฟอสเฟต มีอีกชื่อหนึ่งว่า sodium phosphate
trosodium monophosphate. Sodium Phosphate Tribasic, Dodecahydrate, Crystal.
White, free-flowing, granular or powder. Formula: Na3PO4.12H2O.1/4 NaOH
Synonyms: Sodium phosphate,
tribasic; Sodium orthophosphate; Sodium phosphate; Trisodium orthophosphate;
Phosphoric acid, trisodium salt; Sodium phosphate
Grade: Technical , Uses: Water
softeners; boiler water compounds; detergent; metal cleaner; textiles;
manufacture of paper; laundering; tanning; photographic developers; paint
removers; industrial cleaners.
The major use for trisodium
phosphate is in cleaning agents. In combination with surfactants, TSP is an
excellent agent for cleaning everything from laundry to concrete driveways. TSP
is commonly used after cleaning with mineral spirits in order to remove
hydrocarbon residues. TSP may be used with household chlorine bleach in the
same solution without hazardous reactions.[4] This mixture is particularly good
for removing mildew. TSP is also used as a flux for use in hard soldering
joints in medical grade copper plumbing. The flux is applied as a concentrated
water solution and dissolves copper oxides at the temperature used in copper
brazing. Residues are fully water soluble and can be rinsed out of plumbing
before it is put in service. TSP can be used in ceramic production to lower the
flow point of glazes. Another use is the cleaning, degreasing and deglossing of
walls prior to painting. Trisodium phosphate has a variety of applications but
is primarily used as a cleaning agent, food additive, stain remover and
degreaser.
Trisodium phosphate (TSP) is a
cleaning agent, lubricant, food additive, stain remover and degreaser. It is a
white, granular or crystalline solid, highly soluble in water producing an
alkaline solution.
The item of commerce is often
partially hydrated and may range from anhydrous trisodium phosphate, Na3PO4, to
the dodecahydrate, Na3PO4•12H2O. Most often found in white powder form, it can
also be called trisodium orthophosphate or simply sodium phosphate. Trisodium
phosphate was at one time extensively used in formulations for a wide variety
of consumer grade soaps and detergents, but ecological problems have largely
ended that practice, at least in the western world. Substitutes are not as
effective, but the raw chemical can be bought in bulk to add to other
detergents.
Uses
Cleaning
The major use for trisodium
phosphate is in cleaning agents. The pH of a 1% solution is 12, and the
solution is sufficiently alkaline to saponify grease and oils. In combination
with surfactants, TSP is an excellent agent for cleaning everything from
laundry to concrete driveways. This versatility and low manufacturing price,
made TSP the preferred basis for a plethora of cleaning products sold in the
mid-20th century. TSP is still sold, and used, as a cleaning agent, but during
the late 1960s in the United States,[citation needed] government regulators in
seventeen states determined that overuse led to a series of ecological problems
with the damage to lakes and rivers through eutrophication being the most significant.
By the end of the 20th century,
many products that formerly contained TSP were manufactured with TSP
substitutes, which consist mainly of sodium carbonate along with various
admixtures of nonionic surfactants and a limited percentage of sodium
phosphates.
TSP is commonly used after
cleaning with mineral spirits in order to remove hydrocarbon residues.[citation
needed] TSP may be used with household chlorine bleach in the same solution
without hazardous reactions. This mixture is particularly good for removing
mildew, but is ineffective at permanently removing mold.
Although it is still the active
ingredient in some toilet bowl cleaning tablets, TSP is generally not good for
cleaning bathrooms, because it can stain metal and can damage grout.
Flux
In the United States, trisodium
phosphate is an approved flux for use in hard soldering joints in medical grade
copper plumbing. The flux is applied as a concentrated water solution and
dissolves copper oxides at the temperature used in copper brazing. Residues are
fully water soluble and can be rinsed out of plumbing before it is put in
service.
TSP is used as an ingredient in
fluxes designed to deoxygenate nonferrous metals for casting.
TSP can be used in ceramic
production to lower the flow point of glazes.
Painting enhancement
TSP is still in common use for the
cleaning, degreasing and deglossing of walls prior to painting. TSP breaks the
gloss of oil based paints and opens the pores of latex based paint providing a
surface better suited for the adhesion of the subsequent layer.
Food additive
Sodium phosphates (monosodium
phosphate, disodium phosphate, and trisodium phosphate) are approved as a food
additive in the EU, E339.
Exercise performance enhancement
Trisodium phosphate has gained a
following as a nutritional supplement that can improve certain parameters of
exercise performance.[8] The basis of this belief is the fact that phosphate is
required for the energy-producing Krebs cycle central to aerobic metabolism.
Phosphates are available from a number of other sources that are much milder
than TSP. While TSP is not toxic per se, it is severely irritating to gastric
mucosa unless used as part of a buffered solution.
TSP Substitutes
See also: Cleaning products and
the environment
Products sold as TSP substitute,
containing soda ash and zeolites, are promoted as a direct substitute. However,
sodium carbonate is not as strongly basic as trisodium phosphate, making it
less effective in demanding applications. Zeolites are added to laundry
detergents as bulking agents that rapidly break down in water and are
essentially nonpolluting. Cleaning products labeled as TSP may contain other
ingredients, with perhaps less than 50% trisodium phosphate.
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Thai Poly Chemicals Co., Ltd.
บริษัท ไทยโพลีเคมิคอล จำกัด
ที่อยู่36/5 ม.9 แขวง/ตำบลนาดี
เขต/อำเภอเมืองสมุทรสาคร
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Tel.: 034854888,
034496284
Fax.: 034854899,
034496285
Mobile: 0824504888,
0800160016
Website : www.thaipolychemicals.com
Email1 : thaipolychemicals@hotmail.com
Email2 : info@thaipolychemicals.com
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