White to slightly yellow crystal or crystalline powder
White to slightly yellow crystal or crystalline powder
---
Assay(on dry basis)
98.5% ~ 101.5%
99.0% ~ 100.5%
98.5% ~ 101.5%
PH Value
---
5.4 ~ 6.4
5.5 ~ 7.0
Specific rotation
-30.0° ~ -33.0°
-30.0° ~ -32.5°
-29.4° ~ -32.8°
Transmittance
---
≥95.0%
---
Chloride(as Cl)
---
≤0.02%
≤0.05%
Ammonium(as NH4)
---
≤0.02%
---
Sulfate(as SO4)
---
≤0.02%
≤0.03%
Iron(as Fe)
---
≤0.002%
≤0.003%
Heavy metals(as Pb)
≤0.002%
≤0.001%
≤0.0015%
Other amino acids
---
conform
---
Loss on drying
≤0.3%
≤0.2%
≤0.3%
Residue on ignition
≤0.1%
≤0.1%
≤0.1%
Feed Grade:
Item
Specifications
Assay
≥98.5%
9.0% ~ 12.0%
Specific Rotation
-30.0° ~ -33.0°
---
Loss on drying
≤0.5%
≤10%
Residue on ignition
≤0.5%
---
Heavy metal(as Pb)
≤20 mg/kg
≤10 mg/kg
Coliform group
---
≤5000 mpn
Salmonellas
---
Absent
Pharma Grade:
Item
USP32
Assay(on dry basis)
98.5% ~ 101.5%
PH Value
5.5 ~ 7.0
Specific rotation
-29.4° ~ -32.8°
Chloride(as Cl)
≤0.05%
Sulfate(as SO4)
≤0.03%
Iron(as Fe)
≤0.003%
Heavy metals(as Pb)
≤0.0015%
Loss on drying
≤0.3%
Residue on ignition
≤0.1%
L-Tryptophan (Abbreviated Try) is one of human and animal essential amino acids. But it can't be synthesized by the body.
Like other amino acids, L-Tryptophan is one of the building blocks of protein. But unlike some amino acids, L-Tryptophan is considered essential because the body can't manufacture its own. L-Tryptophan plays many roles in animals and humans alike. But perhaps most importantly, it is an essential precursor to a number of neurotransmitters in the brain. As such, L-Tryptophan is the only substance normally found in the diet that can be converted into serotonin. Since serotonin is converted in the brain into melatonin, L-Tryptophan clearly plays a role in balancing mood and sleep patterns.
Used as nutritional supplement and antioxidant. 1. Used in the animal feed to improve animal feed intake, weaken stress reaction, improve animal sleeping. 2. Used in the animal feed to increase the antibody of fetus and young animals. 3. Used in the animal feed to improve milk secretion of dairy cattle. 4. Used in the animal feed to reduce the amount of high protein ration and save feed cost.
As a nutritional supplement, L-tryptophan is to make up amino acid infusions and comprehensive amino acid preparations together with other essential amino acids.
L-tryptophan is made by microbial fermentation which the glucose, yeast extract, ammonium sulfate are used as raw materials and get refined by membrane filtration, ion exchange, crystallization and drying process.
Packaging & Shipping
1. Quality Our products meet MSDS safe standard and we have ISO and other certificate so yan can get high quality products from our company. 2. Price We are the company which is the joint of trade and industry so we cao provide the competitive price and high quality product. 3.Packing Generally, the package is 25 kg. But,we can do according to the customers' request. 4.Transport The products can be transported by Courier, by air or by sea 5.Service We offer specialized logistic service including export declaration,customs clearance and every detail during shipment,this makes us able to offer you one-stop service from the order to the products transported to your hand.
Company Profile
Our company provides chemical raw materials, chemical products, pharmaceutical intermediates, veterinary intermediates, dye intermediates, pigments, cosmetic raw materials, chemical reagents and PVC particles to meet your various needs. With our good experience, we offer detailed technical support and advice to assist customers. We communicate closely with customers to establish their quality requirements. Consistent Quality Our plant has strict quality control in each manufacturing process. Guaranteed.Meanwhile all the materials are tested before each shipment in our laboratory to double confirm the quality. Most competitive pricing Our company is committed to the production and development of titanium dioxide, we always offer the most competitive pricing to customers to help lower their cost in application. Shortest delivery time 90% of orders are shipped within 7-10 days after receipt of the prepayment or Western union Respond in 24 hours to inquiry, feedback or other requirements Our experienced staff is dedicated to answer all of your inquires, feedback or other requirements in 24 hours. We welcome you to contact us for more information and look forward to working with you
Company Profile Introduction
General projects: biotechnology extension services; Other chemical products (excluding dangerous chemicals), pharmaceutical intermediates, food additives, dye intermediates and other chemicals
China