The relationship between fertilizer and Dyeing Agent
Presumably many people in the fertilizer industry remember the second ammonium in the the Eighties or nineties of the 20th century, which was once regarded as a "magic pill" by farmers as a grain-producing country. Domestic fertilizer practitioners cannot produce the same quality as the foreign brands of two ammonium, a number of ammonium manufacturers began to use brown Dyeing Agent. The rise of fertilizer Dyeing Agents in China stems from this brown "magic".
Later, China's fertilizer production began to use the Dyeing Agent, compound fertilizer, urea is also difficult to escape temptation, water soluble fertilizer, controlled release fertilizer, coated fertilizer and other new fertilizers have also been covered with a layer of color coat.
What kinds of Dyeing Agents
In general, there are several types of fertilizer Dyeing Agents: 1. water-soluble Dyeing Agents, pigments or oil-soluble color indigo. 2. Naturally colored substances, such as humic acid, some poly sugar. 3. Inorganic pigments, such as iron oxide series pigments.
Additive amount of Dyeing Agent in fertilizer
Is the Dyeing Agent added to the fertilizer more or less than the dosage in the food? For example, the Chinese approved food additive sunset yellow, in accordance with the "Food Additive Hygiene Standards" (GB2760), used in fruit juice beverages, carbonated beverages, candies, cakes on the color, the maximum allowable use of 0.1 grams/kg, that is, 0.1 of the added amount. Syrup for jam, fruit seasoning and mayonnaise, salad dressing, the maximum allowable use of 0.5 grams/kg, that is, 0.5 of the added amount.
According to senior sources in the fertilizer industry, the amount of pigment added to water soluble fertilizers is generally around 0.4, which is less than the allowable amount of salad dressings that people eat directly.
Does fertilizer stain the soil?
It is true that fertilizer companies used pyridine, quinone, double azo and other high toxicity Dyeing Agents to Dyeing Agent fertilizer, but this situation occurred before 10. Now because of the cost and other factors, enterprises have rarely used.
So, is one of the chemical products of iron oxide system pigments on soil pollution? First of all, as a Dyeing Agent, the amount of iron oxide is very small, and secondly, iron oxide is not a heavy metal, non-toxic, can be added to the soil loss of iron. Therefore, the iron oxide system Dyeing Agents on the soil is not contaminated.
The State encourages the development of water-soluble fertilizers, most enterprises add water-soluble pigments, some enterprises with food-grade pigments, such as lemon yellow, indigo, apple green, carmine and so on.
Why do fertilizers add Dyeing Agent?
Take water-soluble fertilizer as an example: first, many manufacturers design different formulations to different colors, so that farmers quickly identify fertilizer through color, but also reasonably corresponding to each crop in different growth period should be used fertilizer formulations. Second, the dilution of the fertilizer can not be intuitive to see the concentration of fertilizer, so often misleading farmers, and Dyeing Agentd fertilizer, farmers diluted easily through the depth of color to determine the concentration of fertilizer. Third, many fertilizer manufacturers add very few trace elements or additives to fertilizers, and they need to determine whether the fertilizer's mix effect is in the desired state by the appearance of fertilizers. In this sense, adding pigments is an indicative means of producing high quality fertilizers.