With the outbreak of the epidemic, Carbomer raw material has always been an important raw material in short supply. It is mainly used in daily chemical products. Because of the need of epidemic prevention, hand sanitizer is widely used, and carbomer is an important raw material of the product. Therefore, the shortage of carbomer once led to the shortage of hand sanitizers. At that time, cabom went crazy overnight. There are people everywhere asking about cabom. It is conceivable that the price has soared all the way, but it is not satisfactory. There is an unprecedented phenomenon that there is no goods at all. This also led to the behavior of some unscrupulous businessmen shoddy. The quality of carbomer's products was once suspected, and the price difference of middlemen was raised, which caused great losses to those enterprises that really needed carbomer's raw materials.
In this severe situation, it is very difficult to find a reliable and quality guaranteed manufacturer of carbomer. Because people's habitual thinking always feel that the wolf is not worth believing, even if it is true to meet you, there will be all kinds of distrust and suspicion. Just in this case, we met it -- Desheng technology, an enterprise that depends on products. It doesn't talk nonsense with you. It sends samples directly for testing. If it's true or not, you can tell by a try. No matter how much exquisite language there is no real product effect to experience, people are convinced.
Carbomer 940 of Desheng
[character] white loose powder; characteristic slight odor; hygroscopicity.
[identification] take this product 0.1g, dispersed in 20ml water, add 10% hydrogen Sodium Chloride Solution 0.4ml, that is gel form.
[inspection]
Acidity: take 0.10g of this product, evenly disperse and swell in 10ml water, and check according to law, the pH value should be 2.5-3.5.
Viscosity: take 0.5g of this product, evenly disperse it in 98ml water, after full swelling, mix it well, adjust the pH value to 7.3-7.8 with 15% sodium hydroxide solution (test with precision pH test paper), add water to 100ml, mix it well (avoid bubbles), and determine according to law, the dynamic viscosity at 25 ℃ should be 15-30pa · s.
Benzene: take about 1g of this product, weigh it accurately, put it in a tube with plug, add 10.0ml p-xylene, shake it to disperse, add 10.0ml 0.1mol/l sodium hydroxide solution, shake it tightly for 1 hour, and take the supernatant as the test solution. Take an appropriate amount of benzene, weigh it precisely, add p-xylene to make a solution of 10 μ g per 1ml as the reference solution. 1 μ l of the test solution and 1 μ l of the control solution were measured by gas chromatography (Appendix V E). A 3M glass chromatographic column with 201 red support (60-80 mesh) was used. Dinonyl phthalate and organic bentonite were mixed as the fixed solution. The coating concentration was 10%. The column temperature was 100 ℃. The benzene content should not exceed 0.01%.
Weight loss on drying: take this product and dry it under reduced pressure at 80 ℃ for 1 hour. The weight loss shall not exceed 2.0%.
Burning residue: take 1.0g of this product and check it according to the law. The residue shall not exceed 2.0%.
Heavy metal: the residue left under the item of burning residue shall be inspected according to law, and the content of heavy metal shall not exceed 20 parts per million.
[content determination] take about 0.4g of this product, accurately weigh it, evenly disperse it in 400ml water, stir to dissolve it, titrate it with sodium hydroxide titrant (0.25mol/l) according to potentiometric titration (Appendix VII a) (at the end point, stir at least 2 minutes after each drop). Every 1 ml sodium hydroxide titrant (0.25 mol / L) is equivalent to 11.25 Mg - COOH.
In the production process, De Sheng has passed through the numerous checkpoints and tests, and now has the quality of carbomer 940. The powder is white and flawless, and the gel liquid is crystal clear.
