L-Tryptophan
Executive standard: GB/T 25735-2010
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L-Tryptophan
Chinese name:L-色氨酸
English name:L-Tryptophan
Chemical formula:C11H12N2O2
Molecular weight:204.23
CAS number:73-22-3
Character:
This product is a white to slightly yellow crystalline flake or crystalline powder; No odor, slightly bitter taste.
Product indicators:
| Executive standards |
GB/T 25735-2010 |
|
|
Physical and chemical indicators
|
Content (dry basis)/% |
≥98.0 |
| Loss on drying/% |
≤0.5 |
|
| Coarse ash content/% |
≤0.5 |
|
| Arsenic/(mg/kg) |
≤2 |
|
| Lead/(mg/kg) |
≤5 |
|
| Cadmium/(mg/kg) |
≤2 |
|
| Mercury/(mg/kg) |
≤0.1 |
|
| Microbiological | Salmonella (in 25g sample) |
不得检出 |
Packaging specifications:
Bagged. The inner packaging material is a high-density polyethylene plastic bag, and the outer packaging material is a paper plastic composite bag; Packaging can be carried out according to user requirements.
Storage conditions:
The product should be stored in a dark, ventilated, cool, and dry place to prevent rain and moisture, and should not be mixed with toxic and harmful substances.
Product Description:
1. Important nutrients cannot be synthesized in animals. It can increase animal feed intake, promote its growth, and improve feed utilization efficiency;
2. It can participate in the update of plasma proteins in animals and promote the action of riboflavin. It also helps in the synthesis of niacin and heme, significantly increasing antibodies in pregnant animal fetuses, and promoting lactation in lactating cows and sows;
3. The level of tryptophan intake in animals can affect their emotional state and reduce aggressive behavior;
4. Tryptophan and its main metabolites, such as 5-HT and melatonin, can reduce the emission of nitrogen from poultry manure, improve the utilization of crude protein, and reduce environmental pollution caused by intensive livestock and poultry farming by regulating animal feeding, immunity, and stress resistance. Adding tryptophan can reduce the aggressiveness of chickens and reduce pecking of feathers and anus.
Recommended usage:
Reference for tryptophan requirement in pigs: For the appropriate content of dietary tryptophan, NRC (1998) pointed out that the total tryptophan requirement for 20-50kg pigs is 0.13%~0.18%, and the total tryptophan requirement for 50-120kg pigs is 0.09%~0.17%.
In addition, L-tryptophan is an important precursor for the biosynthesis of auxin indoleacetic acid in plants.
| breed | Growth stage | Tryptophan requirement/% |
| Broiler chicken |
0~3weeks old |
0.20 |
|
Laihang White Shell Egg Chicken
|
3~6weeks old |
0.18 |
|
6 ~8weeks old |
0.16 |
|
|
0~6weeks old |
0.17 |
|
|
6 ~12weeks old |
0.14 |
|
|
12~18weeks old |
0.11 |
|
| 18~Start production |
0.12 |
|
| black-bone chicken |
0～4weeks old |
0.13 |
| Beijing duck |
0~3weeks old |
0.25 |
| goose |
0~4weeks old |
0.28 |
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