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Name L-Tryptophan

Molecular formular C11H12N2O2

Molecular weight 204.23

CAS No. 73-22-3

面议

Specification

L-Tryptophan

CP2015

AJI92

USP32

USP40

Description

White to slightly yellow crystals or crystalline powder

White to yellowish white crystals or crystalline powder

---

---

Identification

Conforms

Conform

---

Conform

Assay

≥99.0%

98.5%~100.5%

98.5%~101.5%

98.5%~101.5%

pH

5.4~6.4

5.4~6.4

5.5~7.0

5.5~7.0

Transmittance

≥95.0%

≥95.0%

---

---

Loss on drying

≤0.2%

≤0.20%

≤0.3%

≤0.3%

Residue on ignition

≤0.1%

≤0.10%

≤0.1%

≤0.1%

Chloride

≤0.02%

≤0.020%

≤0.05%

≤0.05%

Heavy Metals

≤10ppm

≤10ppm

≤15ppm

≤15ppm

Iron

≤20ppm

≤20ppm

≤30ppm

≤30ppm

Sulfate

≤0.02%

≤0.020%

≤0.03%

≤0.03%

Endotoxin

50EU/g

---

---

---

Arsenic

≤1ppm

≤1ppm

---

---

Ammonium

≤0.02%

≤0.02%

---

---

Other amino acids

Conforms

Meet the requirements

---

---

Pyrogen

---

Conforms

---

---

Specific Rotation

-30.0° ~ -32.5°

-30.0° ~ -32.5°

-29.4°~-32.8°

-29.4°~ -32.8°

Organic impurities

---

---

---

Conforms




Specification


L-Tryptophan

CP2015

AJI92

USP32

USP40

Description

White to slightly yellow crystals or crystalline powder

White to yellowish white crystals or crystalline powder

---

---

Identification

Conforms

Conform

---

Conform

Assay

≥99.0%

98.5%~100.5%

98.5%~101.5%

98.5%~101.5%

pH

5.4~6.4

5.4~6.4

5.5~7.0

5.5~7.0

Transmittance

≥95.0%

≥95.0%

---

---

Loss on drying

≤0.2%

≤0.20%

≤0.3%

≤0.3%

Residue on ignition

≤0.1%

≤0.10%

≤0.1%

≤0.1%

Chloride

≤0.02%

≤0.020%

≤0.05%

≤0.05%

Heavy Metals

≤10ppm

≤10ppm

≤15ppm

≤15ppm

Iron

≤20ppm

≤20ppm

≤30ppm

≤30ppm

Sulfate

≤0.02%

≤0.020%

≤0.03%

≤0.03%

Endotoxin

50EU/g

---

---

---

Arsenic

≤1ppm

≤1ppm

---

---

Ammonium

≤0.02%

≤0.02%

---

---

Other amino acids

Conforms

Meet the requirements

---

---

Pyrogen

---

Conforms

---

---

Specific Rotation

-30.0° ~ -32.5°

-30.0° ~ -32.5°

-29.4°~-32.8°

-29.4°~ -32.8°

Organic impurities

---

---

---

Conforms



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