Zinc PCA powder, usually present in a white or slightly yellowish crystalline form, is an exogenous amino acid and belongs to the category of plant nutrients. Molecular formula C10H12N2O6Zn, CAS 15454-75-8. This color is the result of the interaction between its molecular structure and light. White usually means that the substance has weak absorption of visible light, allowing light to pass directly and reflect back, resulting in a bright white color. Its solubility in water is relatively high, which means it can dissolve in water at a higher concentration. This good water solubility makes zinc pyroglutamine widely used in some water-based systems. Through leaf absorption, plant chlorophyll content can be increased, enzyme activity can be enhanced, CO2 permeation can be promoted, various nutrients in the plant body can be regulated and balanced, significantly improving the quality of agricultural products. Used to prepare foliar fertilizer containing L-pyroglutamic acid. It can also be used to control excessive sebum secretion, prevent pore blockage, and effectively prevent acne. Has resistance to bacteria and fungi. Can be used for skincare, hair care, sun protection products, cosmetics, etc. Pyroglutamic acid is 5-oxoproline, composed of α- NH2 base and γ- Dehydration between hydroxyl groups forms intramolecular amide bonds; It can also be formed by the loss of amide in glutamine molecules. If there is a deficiency in glutathione synthase, it can cause a series of clinical symptoms such as pyroglutamatemia. Zinc pyroglutamine is the zinc salt of pyroglutamic acid.
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Chemical Formula |
C10H12N2O6Zn |
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Exact Mass |
320 |
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Molecular Weight |
322 |
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m/z |
320 (100.0%), 322 (57.4%), 324 (38.6%), 321 |
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Elemental Analysis |
C, 37.35; H, 3.76; N, 8.71; O, 29.85; Zn, 20.33 |
Synthetic Zinc PCA powder: in the ethanol system, add an appropriate amount of dehydration catalyst, raise the temperature to 88 ~ 100 ℃ for dehydration reaction, filter, concentrate, crystallize after reaction, and extract the crystal to obtain L-pyroglutamic acid. The method of the invention belongs to a closed process, with simple operation and appropriate proportion. The dehydrated L-pyroglutamic acid is soluble in ethanol, while the UN dehydrated L-glutamic acid is insoluble in ethanol. The unreacted L-glutamic acid is directly removed through filtration and crystallized to obtain high-purity L-pyroglutamic acid, with a purity of more than 99.5% and a yield of more than 85%; The dehydration catalyst concentrated sulfuric acid is added to accelerate the dehydration reaction, and the reaction at a low reaction temperature avoids the racemization of L-pyroglutamic acid. The concentrated sulfuric acid exists in the mother liquor filtered out, and can be returned together with the UN dehydrated L-glutamic acid to continue the next batch of ingredients. The cost is low, and it is suitable for industrial production.
Zinc pyroglutamine can be used to prepare a leaf fertilizer containing L-pyroglutamic acid. Exogenous amino acids are plant nutrients. Through leaf absorption, they can increase the chlorophyll content of plants, improve the activity of biological enzymes, promote co permeation, regulate and balance various nutrients in plants, and significantly improve the quality of agricultural products. Trace elements such as calcium, zinc, copper, boron, iron and manganese are indispensable in the growth and development of crops. Otherwise, crops will suffer from "element deficiency". Therefore, there are many amino acid Leaf Fertilizers and trace element Leaf Fertilizers in the market.
Foliar fertilizer containing L-pyroglutamic acid, including 10 ~ 20 portions of L-pyroglutamic acid; 2 ~ 15 parts of l-pyroglutamine calcium; Zinc l-pyroglutamine 2 ~ 10 parts; 2 ~ 5 parts of L-pyroglutamic acid copper; 3 ~ 5 parts of wet developing agent; 1 ~ 3 portions of antifreeze; Water 42 ~ 80 parts. The use method comprises the following steps: diluting the leaf fertilizer with water for 500 ~ 800 times and spraying it on the plant leaf surface. The components of foliar fertilizer are clear and the content proportion is fixed, which is convenient for quality control and ensures the quality of foliar fertilizer. Moreover, the fruit setting rate of Apple inflorescence is increased from 70.66% to 83.75%, and the fruit setting rate of flower is increased from 23.72% to 31.21%; The fruit cracking rate of grape decreased from 21.77% to 6.05%.
Zinc PCA powder is a white solid powder. Due to its unique functions of controlling oil, moisturizing and anti-acne, it is widely used in cosmetics, skin care products and personal care products. The core component zinc (Zn) content ranges from 19.4% to 21.3%, while the content of PCA (pyrrolidone carboxylic acid) is as high as 78.3% to 82.3%. This high-purity formula enables it to maintain stability in various application scenarios. The following provides a detailed analysis of the usage of PCA zinc from aspects such as application scenarios, addition amount, pH value control and packaging form.
Core Usage Scenarios and Effects
PCA Zinc has an extremely wide range of applications, covering almost all skincare and personal care products that require oil control, moisturization, or anti-acne functions:
Facial skin care products
Oil control and tightening: As an oil control factor, PCA zinc can effectively balance oil secretion, prevent the skin from becoming shiny, and is particularly suitable for oily and combination skin types. For example, adding PCA zinc to lotions, creams, or gels can significantly reduce oil production in the T-zone and constrict pores, enhancing the skin's luster.
Anti-acne and repair: PCA zinc has anti-inflammatory properties and can inhibit the proliferation of acne-causing bacteria, reducing the formation of acne. In acne-removing essences or spot-applied products, PCA zinc is often combined with ingredients such as salicylic acid and tea tree essential oil to form a "acne removal + fade marks" dual-effect formula. For instance, a certain acne-removing product uses a layered design, with the lower layer containing PCA zinc powder, which can quickly smooth out acne upon application and leave no acne marks.
Moisturizing enhancement: The moisturizing effect of PCA zinc stems from its similarity to the skin's natural moisturizing factors (NMF), strengthening the skin's barrier function and reducing water loss. In dry seasons or for sensitive skin care, PCA zinc can work synergistically with ingredients such as hyaluronic acid and glycerin to enhance the product's moisturizing power.
Hair care products
PCA zinc gives hair a soft and smooth feel, reducing frizz. Adding PCA zinc to shampoos, conditioners, or hair masks can improve the scalp environment, balance oil secretion, and prevent dandruff formation. For example, a certain oil-control shampoo combines PCA zinc with menthol to achieve "cleaning + soothing" dual effects, suitable for people with oily scalps.
Body care products
PCA zinc's mildness makes it suitable for body lotions, body washes, and other products. In body care, PCA zinc can alleviate back acne and improve rough skin texture. For instance, a body scrub containing PCA zinc can effectively reduce back acne recurrence through a combination of physical exfoliation and chemical oil control.
Key Usage Parameters
Addition amount
The recommended dosage of PCA zinc is 0.1% to 3%. The specific ratio should be adjusted according to the product type and efficacy requirements. For example:
High-concentration oil-control products: Such as acne-removing essence or mud masks, 1% to 3% zinc PCA powder can be added to quickly balance oil production and inhibit acne.
Daily moisturizing products: Such as lotions or creams, adding 0.1% to 0.5% PCA zinc is sufficient. Excessive oil control may cause skin dryness.
Shampoo or conditioner: Adding 0.5% to 1% PCA zinc can improve the scalp environment while maintaining the softness of the hair.
pH value control
The ideal pH range of PCA zinc is 5.5 to 7.0, close to the natural pH of the skin. If the product's pH is too high (alkaline) or too low (acidic), it may affect the stability and efficacy of PCA zinc. For example, in an acidic environment (such as products containing alpha-hydroxy acids), PCA zinc may decompose, resulting in weakened oil-control effect; while in an alkaline environment (such as some皂-based cleansers), PCA zinc may react with other components, affecting the product's texture. Therefore, during formulation design, pH values must be strictly monitored, and buffers may be used for adjustment if necessary.
Packaging forms and storage suggestions
Common packaging forms of PCA zinc include 1kg, 5kg, and 25kg bags or barrels, suitable for different production requirements. When storing, the following points should be noted：
Light-proof sealing: PCA zinc is prone to absorbing moisture and forming lumps. It should be stored in a dry and cool place, avoiding direct sunlight.
Protection against moisture and contamination: After opening, it should be used as soon as possible. The remaining powder should be sealed for storage to prevent moisture absorption or impurities from entering.
Compatibility testing: If PCA zinc needs to be combined with other active ingredients (such as vitamin C, retinol), compatibility testing should be conducted in advance to avoid component conflicts that may lead to product failure.
Practical Application Cases
Acne-removing mud mask
A certain mud mask has PCA zinc as its core ingredient, combined with bentonite and tea tree essential oil. It achieves the effect of removing acne through the dual mechanisms of "absorbing oil + anti-inflammatory and antibacterial". When using it, users need to first apply heat to open the pores, then apply the mud mask thickly for 10 to 15 minutes, and finally use a blackhead remover to clean the floating blackheads. After using it for one month, the amount of sebum produced by the skin has significantly decreased, and the problem of blackheads and acne has been improved.
Oil-control shampoo
A certain shampoo has PCA zinc as its main ingredient, combined with menthol and salicylic acid, forming "cleaning + oil control + soothing" triple effects. User feedback shows that after using it, the speed of oil production on the scalp slows down, the hair becomes more fluffy, and there is no dryness or tightness sensation.
Hydrogel lotion
A certain lotion combines PCA zinc with hyaluronic acid to create a formula that "controls oil externally while hydrating internally." Users with oily skin report that their skin remains fresh and matte while moisture levels significantly increase, alleviating dryness issues during winter.
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FAQ
1. How to dissolve zinc in PCA?
Therefore, check that the pH is below 7 before adding Zinc PCA as a pure powder or as an aqueous solution to the product. Zinc PCA can be dissolved up to 18% in water (or aqueous solution). This takes some time and should be stirred continuously. You can heat it up to 50-60°C, then it will dissolve faster.
2. Is zinc PCA soluble in water?
Solubility: in water, propylene glycol, alcohol (at 50 C). Brief heating to higher temperatures is permitted. Usage: dissolve in water and add to the hot aqueous phase before emulsification. The active is stable at pH 4.0 to 6.0.
3. How to dissolve zinc powder?
Zinc powder residues can be dissolved with a diluted solution of acid, the solution can then be discarded in the appropriate acidic waste container, clearly labeled and kept closed all the times.
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