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Name DL-Methionine

Molecular formular C5H11NO2S

Molecular weight 149.21

CAS No. 59-51-8

面议

Specification

DL-Methionine

AJI92

USP26

EP4

FCC V

Description

White crystals or crystalline powder

White crystals or crystalline powder

White crystals or crystalline powder

White crystals or crystalline powder

Identification

Conform

---

Conforms to the requirements

Conforms to the requirements

Assay

99.0%~100.5%

98.5%101.5%

99.0%101.0%

98.5%~101.5%

pH

5.6~6.1

5.6~6.1

5.46.1

5.66.1

Transmittance

≥98.0%

---

---

---

Loss on drying

≤0.30%

≤0.4%

≤0.5%

≤0.5%

Residue on ignition

≤0.10%

≤0.5%

≤0.1%

≤0.1%

Chloride

≤0.020%

≤0.02%

≤0.02%

---

Heavy Metals

≤10ppm

≤15ppm

≤10ppm

---

Iron

≤10ppm

≤30ppm

---

---

Sulfate

≤0.020%

≤0.03%

≤0.02%

---

lead[Pb]

---

---

---

≤5ppm

Arsenic

≤1ppm

---

≤1ppm

---

Ammonium

≤0.02%

---

≤0.02%

---

Other amino acids

Conforms

Conforms

---

---

Pyrongen

Conforms

---

---

---

Clear and colorless

---

---

Clear, colorless

---

Related substance

---

---

Meets with the requirements

---

Particle size

---

---

≥95%--50um-  ≥1.0%≥100um

---




Specification


DL-Methionine

AJI92

USP26

EP4

FCC V

Description

White crystals or crystalline powder

White crystals or crystalline powder

White crystals or crystalline powder

White crystals or crystalline powder

Identification

Conform

---

Conforms to the requirements

Conforms to the requirements

Assay

99.0%~100.5%

98.5%101.5%

99.0%101.0%

98.5%~101.5%

pH

5.6~6.1

5.6~6.1

5.46.1

5.66.1

Transmittance

≥98.0%

---

---

---

Loss on drying

≤0.30%

≤0.4%

≤0.5%

≤0.5%

Residue on ignition

≤0.10%

≤0.5%

≤0.1%

≤0.1%

Chloride

≤0.020%

≤0.02%

≤0.02%

---

Heavy Metals

≤10ppm

≤15ppm

≤10ppm

---

Iron

≤10ppm

≤30ppm

---

---

Sulfate

≤0.020%

≤0.03%

≤0.02%

---

lead[Pb]

---

---

---

≤5ppm

Arsenic

≤1ppm

---

≤1ppm

---

Ammonium

≤0.02%

---

≤0.02%

---

Other amino acids

Conforms

Conforms

---

---

Pyrongen

Conforms

---

---

---

Clear and colorless

---

---

Clear, colorless

---

Related substance

---

---

Meets with the requirements

---

Particle size

---

---

≥95%--50um-  ≥1.0%≥100um

---



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