Learning About The Basic Properties Of Sodium Nitrite

Sodium nitrite is a stable, odorless compound having a molecular weight of 69.00. This sodium salt of nitrous acid is pale yellow or straw colored and is available in either the form of dry granules, flakes and even water solutions. The compound needs to be handled carefully while using, storing or even shipping it from one destination to another mainly because it is an oxidizer and toxic in nature.


Sodium Nitrite is generally produced for industrial use by making the oxides of nitrogen to get absorbed into sodium carbonate or sodium hydroxide solutions. The sodium nitrite solution produced by this method is then concentrated to produce slurry of crystals acquired by using the conventional evaporation and crystallization equipments. To separate the crystals form the original liquid, the centrifugation technique is generally used. Once the crystals have been separated, they are dries and treated with an anti-caking agent to ensure that they remain in the free-flowing form. The other methods of producing the compound involve various chemical reactions carried out with the aim of reducing sodium nitrate to yield sodium nitrite.


In its pure form, anhydrous Sodium nitrite has a specific gravity of 2.168 at 0ºC/0°C. The melting point of the compound is 284°C while it starts to decompose when the temperature goes beyond 320°C, to release N2O2, NO, and Na2O. Within the temperature range of 158–165°C, the physical properties of sodium nitrite undergo a significant change. The compound, in addition to being water soluble, also possesses hygroscopic properties. Sodium nitrite displays a stable nature in alkaline solutions but when exposed to acidic solutions, the compound releases unstable nitrous acid. The compound serves as a primary source of nitrous acid, used for organic synthesis.


When exposed to atmospheric oxygen, sodium nitrite oxidizes spontaneously to form the brown-colored compound named nitrogen-dioxide. The compound can convert ammonium ion to nitrogen, urea to carbon dioxide and nitrogen, and sulfamate to sulfate and nitrogen which makes it a good oxidizing agent. This makes it perfect for use in various industries including manufacturing of dye, rubber chemicals and pharmaceuticals, as a corrosion inhibitor, in heat treating and heat-transfer salts, in meat curing, and several other applications.


Royce is a fully diversified international company which was founded in 1929 to manufacture chemicals for textile industry. Today more than 80 years later, they have a resounding presence across the world and offer solution to diverse needs of chemicals to their customers which also include sodium nitrite.

What All You Should Know About Epoxy Paint

What makes Epoxy paints truly exceptional is their ability to take the beating and still look amazingly good. Whether it’s parking decks, factories, garages or commercial floors, epoxy coating can make any high traffic area look great without any maintenance. The tough epoxy paints are also resistant to chemicals, grease, acids and solvents along with being versatile. Marine epoxies are high performance paints that can provide resistance against corrosive seawater.


However, concrete and metal are the most common surfaces where epoxy coating are applied and the finishing depends on preparation and application techniques. Properly prepared mixture displays superb adhesion whether it is applied by brush, roller or trowel.


Epoxy coating consist of two parts-the base and the curing agent. While storing, these two are kept separate and mixed minutes before the paint is to be applied. The secret of a lustrous and lasting finish lies in the curing process.


After you mix the two together, you have to apply the paint quickly before it dries to the extent that it is rendered useless for further use. Often referred as pot life, the drying time can range from anywhere from 10 minutes to an hour. Drying process between the coatings is called curing and an epoxy application with several coats may take numerous days to fully cure.

The final finish of the epoxy coating is decided by the curing process which should take recommended time in order to be durable and tough. However, in case the curing time is stretched beyond the fixed time, the quality of final finish will suffer.


Ideally, Epoxy paints should be applied within close temperature range of 50 to 90 degrees Fahrenheit, with 65 to 70 degrees taken as perfect applicant temperature. The pot life and curing gets adversely affected when temperature is outside of this range.


Moisture is another important factor that affects the application process. Not only the surface needs to be absolutely dry but atmospheric humidity should also be average. Curing process slows down when the humidity is high but certain additives when added to the mixture allow the paint to be applied in high atmospheric humidity without any damage to the final finish.


Royce is a fully diversified international company which was founded in 1929 to manufacture chemicals for textile industry. Today more than 80 years later, they have a resounding presence across the world and offer solution to diverse needs of chemicals to their customers which also include epoxy. For detailed information, logon to http://www.royceintl.com

Plastic Dye – Adding Color To The Prosperity Of Plastic Industry

It is well known fact that proper color schemes and right shades play a vital role in enhancing the beauty of any object. That is why manufacturers of industrial as well as consumer products lay a lot of stress on using the right kind of dyes that will make their products attractive and eye catching. Over the years the use of plastic in various manufacturing process has increased tremendously and there is an unending demand of the wide range of plastic products that can be put to numerous uses in everyday life. In such a scenario, plastic product manufactures try to make their merchandise more striking for customers, by using a wide variety of plastic dye.

In the plastic industry, perfect color forms an integral aspect of every product and hence has to be chosen with considerable attention. The choice of color not only depends on the end use of the product but also upon the impact of the color on the product being manufactured. Most often manufacturers are unaware of the negative effects that the wrong choice of color can have on the overall, strength and durability of the plastic product.

Generally, dyes and pigments are the most common types of colorants used in the plastic industry. Even though both these colorants use the technique of visible light absorption and scattering, to impart color to the target object, there is a limited use of dyes in the plastic industry mainly because of the fact that the dyes used in this industry need to be strong, show good heat stability and be transparent. Plastic dye is the most common type of dye that is used for coloring plastics. These solvent based dyes can be used for coloring a wide range of materials including acetates, nylon, polyester, acrylics, PVC, PMMA, PETP, polystyrene and styrene monomers.

The choice of using a dye or a pigment to impart color to a plastic product largely depends on the type of base polymer being used for manufacturing the product. While pigments are a preferred choice for coloring polyolefins, dyes are primarily used for imparting color to polycarbonate, polystyrene, acrylic, and other types of polymers, mainly because they exhibit great color strength and transparency. Another important and decisive factor in choosing the coloring agent is its compatibility with the base resin, which ensures the prevention of a color shift over the time.

Royce is a fully diversified international company which was founded in 1929 to manufacture chemicals for textile industry. Today more than 80 years later, they have a resounding presence across the world and offer solution to diverse needs of chemicals to their customers which also include Plastic dye. For detailed information, logon to http://www.royceintl.com

Why Good Specialty Chemicals Manufacturer is Imperative For Your Business

If you have been manufacturing products that require specialty chemicals, you probably understand the importance of sourcing them from good companies. Good quality chemicals enhance the quality of your products, making them safer, cleaner and more effective. In fact, the success of any manufacturer depends, to a very large extent, on the supplier from whom they outsource their raw material. Here are a few things that you need to look out for when searching for reliable manufacturer.

Safety Standards

One thing that you should ensure while choosing a speciality chemicals manufacturer is stringent safety measures. They should not only be committed towards the safety of its employees but also the environment and public at large.


The best way to determine the standard of quality management systems is to interview the manufacturer and ask if they adhere to ISO standards of safety. One way to find it out is to check active programmes for employee safety and healthy work environment. Along with that, look for certification that authenticates that company’s operations and chemical processes do not have a negative impact on the environment.


Check if the company is willing to add safety compliance in contract wherein it ensures that it will stick to governmental regulations. All reputable companies maintain an open book policy that allows clients, employees and local communities to discuss safety protocols and clean up measures. You can also verify REACH compliance (registration, evaluation, authorization and restriction of chemicals) to ensure the safety repertoire of specialty chemicals manufacturer you intend to work with.

Chemical Applications

You should also look for well-diversified chemical applications and processes before you settle for a chemical manufacturer. Don’t hesitate to ask if they can provide products from a few hundred kilos to a few thousand tonnes. The skill and experience of a manufacturer can be gauged by the fact that they can manufacture viscous products as well as isolate and dry components them if they were in flammable solvents. Only a good manufacturer has the equipment and expertise to handle exothermic reactions of chemical processes.


Make sure that Specialty Chemicals Company you choose has facilities with centrifuges, reactors, and dryers along with enough storage capabilities to meet your chemical manufacturing needs. Having modern lab facility for testing is another important aspect that cannot be ignored.


Royce is a fully diversified international company which was founded in 1929 to manufacture chemicals for textile industry. Today more than 80 years later, they have a resounding presence across the world and offer solution to diverse needs of chemicals to their customers including speciality chemicals. For detailed information, logon to http://www.royceintl.com

Polymer Colorant - Learning Some Basic Facts

Plastic is undoubtedly one of the most important inventions of human history, which has become an integral part of our everyday lives. The term plastic is generally used for a wide range of synthetic or semi-synthetic products created as a result of polymerization and having the basic property of plasticity. However, most often plastics contain other substances or additives which help in enhancing some of their basic properties such as their stiffness, strength, resistance to heat and flame or even resistance to electricity. Polymer colorant is one of the several additives used and serves the specific purpose of imparting color to plastics.


The colorants used with plastics are primarily of two types, namely organic colorants also known as dyes and inorganic colorants also known as pigments. Generally, the choice of the type of polymer colorant that would be most suitable for the plastic depends on the amount of light that the plastic is exposed to and the service temperature of the plastic. Since pigments show a greater resistance to both temperature and light they are used for dying plastics that are more likely to be used in high temperature areas where they are also constantly exposed to light. Other important factors that need to be considered during the choice of a colorant for plastics are their applications, level of colorfastness and reaction to base plastic material.


Today, through the use of a proper combination of polymer colorant system, it is possible to add special effects to the appearance of plastic. That is why it is now possible to find plastic that have a metallic, pearlescent, stone and fleck and even thermo-chromatic and photo-chromatic appearance. It is also vital to use the right colorant system to ensure greater efficiency of the plastic end product. For example using colorant systems that provide little or no X-ray opacity for plastics intended to be used in medical applications, can render the end products useless for such purposes. As such it is vital to pre-determine the end use of the plastic prior to choosing the most suitable coloring option for it. Similarly, in plastics that are used for manufacturing toys or items for household use, the brightness and safety takes prominence over other factors.

All You Need To Know About Solvent Dye

Solvent dye, which is also popularly known by the name of oil dye, is the type of dye that is generally soluble in an organic solvent. While most dyes exhibit the property of ionization, a solvent dye generally does not ionize. These dyes color by getting dissolved in the targeted material, which is generally a lipid or a non-polar solvent. The naming pattern of solvent dyes has the word solvent followed by the name of the base color and a unique number. The classification helps in specifically identifying the dyes through the name of the stated color and its primary mechanism of staining.


A solvent dye is generally introduced in the form of a solution that is dissolved in an organic solvent. A large number of solvent dyes are basically azo dyes, which have been molecularly re-arranged to get rid of their ionizing capability. The molecular re-arrangement also enables these dyes to become soluble in non-polar solutions such as triglycerides. Some other common solvents for solvent dyes include alcohols, ethers, ketones, aliphatic and aromatic hydrocarbons, oils, fats, waxes and chlorinated hydrocarbons. Although, being soluble in an organic solvent is a basic physical characteristic of a solvent dye, there are some important applications, where the dyes need to be applied directly instead of first dissolving them in a solvent.


The fact that solvent dyes are soluble in non-polar mediums lends them a versatility that makes them perfect for use in a wide range of applications. They are used in industries on a large scale for foil printing, printing inks, marking pens, ball point pens, candles and other waxes, polishes, leathers, wood stains, acrylic resins, varnishes and shellacs. They are even used to signal smoke and have a diverse usage in the pyrotechnics industry. Additionally, these dyes are also widely used in the automotive industry for coloring lubricants as well as in the industrial cutting sector.


However, the most common and widespread use of solvent dyes is in the plastic industry where they are use to impart color to a wide range of solid materials that include acetates, nylon, polyester, acrylics, PVC, PMMA, PETP, polystyrene and styrene monomers. They are also used as integral components in the manufacturing of biological stains used to distinguish distinct cell structure components that play a vital role in medical diagnosis and scientific research.

Learning Some Important Facts About Vat Dye

When it comes to choosing a dye for industrial that provides not only high quality color fastness but also great resistance to weathering and light, a Vat dye is an obvious choice. Generally, Vat dyes exhibit qualities of a speedy effect and a good degree of exhaustion besides which they diffusion within the fiber at a very slow pace. These dyes have a fairly equal particle size when produced commercially as a large particle size results in poor stability besides causing a reduced color yield in some dyes.


Vat dyes are divided into four main categories depending on the temperature, and the quantity of caustic soda hydrosulfite and salt used for dyeing. The first category is the IN dyes which require high temperature as well as large quantities of caustic soda and hydrosulfite. The IW dyes form the second category and they require medium temperature and medium quantity of caustic soda and hydrosulfite plus salt. The next category is of IK dyes which require low temperature and a small amount of caustic soda and hydrosulfite plus salt. The fourth category is of IN Special dyes which require a greater amount of caustic soda and higher temperature than IN dyes.


A number of methods for using Vat dyes have been designed and used. Various factors determine the rate of reduction of Vat dyes, including temperature, time and pH as well as the concentration of the reducing agent. The most common type of reducing agent used for coloring with Vat dyes is sodium hydrosulphite, which is also known by the name of hydros. It is important to understand that only a part of hydros is actually used up in the reduction of Vat dyes while, a major percentage of the compound is destroyed by its reaction with atmospheric oxygen.


The coloring of cellulosic fibers using a dye is completed in various stages. In the first stage the insoluble vat pigment is converted into soluble sodium leuco-vat anions, which in turn is diffused into the cellulosic fibers. The next stage involves the remomal of all the alkalis and reducing agents from the fiber by washing them off. In the next stage, the soluble dye contained within the colored fiber is converted back into insoluble pigments through oxidation. The final stage is the soaping of the fiber which helps in re-orientating and associating the isolated vat pigment molecules to create a more crystalline form.