Solvent 646: specifications, GOST, composition

Solvent 646 is a very effective universal solvent, designed for use when working with a variety of paints.Thanks to him, the coating after drying acquire extra shine.In this article you will learn:

- that is a solvent 646;

- specifications;

- GOST requirements which it corresponds.

General characteristics of the solvent

solvent grade 646 - a clear, colorless liquid (in some cases may have a yellowish tint), characterized by a specific smell.The density of the solvent is 0.87 grams per cubic, it does not freeze and gaining viscosity.Spontaneous combustion at 403 degree boils at 59 degrees.

is made in accordance with the requirements of GOST 18188-172.The solvent should have a uniform composition.It should not be observed turbidity and delamination.Also exception of suspended particles in a liquid.

produced in industrial packaging in plastic and glass containers (bottles) of various sizes.

Solvent 646: characteristics, composition

are compounds VOC.The solvent 646, which correspond to the specifications GOST 18188-72, included the following substances:

  • toluene - 50%;
  • butanol - 15%;
  • butyl acetate - 10%;
  • ethyl spirt- 10%;
  • acetone - 7%;
  • ethylcellosolve - 8%.

Due to its composition is considered to be the most active dissolving material.

solvent 646 has the following specifications:

  • value volatility of ethyl ether in the range from 8 to 15;
  • number of coagulation is at least 35%;
  • acid value exceeds 0.06 mg KOH / g;
  • Water content (Fischer) of not more than 2%;
  • diluting effect - after drying is not observed the presence of whitening and film nitroenamels is characterized by a smooth surface without blemishes.

Where applicable?

Solvent 646 specifications allow use with a variety of paints, including nitrocellulose, melaninoamidnymi, glyptal, acrylic, epoxy.It is used either as an additive in the production of these materials, or for dilution to the desired consistency before use.Also, the reagent is added to the filler and primer for optimum workability, allowing perfect leveling of the surface.

In some cases, the solvent is R-646, which correspond to specifications STATE, is used as a material for various degreasing surfaces or for washing equipment (to optimize a particular process).What advantages

different solvent 646?

Among the main advantages of solvent grade 646 are the following:

  • characterized by versatility;
  • very high solvent power;
  • coating gives extra shine;
  • easy to use;
  • does not cause burns in case of contact to the skin surface;
  • not form greasy spots on the treated surface;
  • evaporates, leaving no smell.


solvent added to the paint or varnish in small pieces to the desired density and viscosity.Bred mixture thus must constantly stir.As the solvent is characterized by high activity, while working with them should be particularly careful not to damage the bottom layer of the coating.

Precautions solvent

work should be carried out in rooms with good ventilation, because the substance is toxic (classified as the third class of danger).In addition, when working with solvent 646 brands should use personal protective equipment such as dust mask and gloves.It is also recommended to use safety glasses.

If the agent was in the area of ​​the skin, it is necessary to treat the water (warm) with soap.In case of contact with the mucous eye after washing should consult a doctor.

Given that the solvent is a flammable material must be handled with care, and in any case does not allow open flames, sparks and smoking near the containers with the reagent.

How to store?

solvent stored in tightly closed containers.In addition, the reagent containers must be protected from moisture, direct sunlight and heat.Do not leave any space heaters in the vicinity of containers with the solvent.

warranty period of storage (according to the information of producers) from the date of manufacture is 12 months, which enables businesses to purchase these products in large quantities.

temperature values ​​at which the solvent is stored, are in the range of from minus 40 to plus 40 degrees.