Product Description
Methyldopa
Brief Description
Molecular Formula: C10H13NO4.3/2H2O
Molecular Weight: 158.195
CAS No.: 41372-08-1
EINECS No.:209-089-2
Other Names: alpha-Methyldopa sesquihydrate
Heavy metals:10ppm Max
Total plate count:≤1000cfu/g
Yeast and Moulds:≤100cfu/g
Competitive price with high quality
Conforms to USP39
Methyldopa Specification
|
ITEMS |
SPECIFICATION |
RESULTS |
|
Appearance |
White to yellowish-white fine powder |
Yellowish-white fine powder |
|
Solubility |
Meets the requirements |
Meets the requirements |
|
Identification |
IR: The sample comparing with the spectrum obtained with standard |
Complies |
|
Absorbance: 3% value if the standard |
0.1% |
|
|
Color reaction: Positive |
Positive |
|
|
Specific rotation |
-25.0°~ -28.0° |
-26.1° |
|
Acidity |
≤ 0.50ml/g |
0.11ml/g |
|
Water |
10.0% ~ 13.0% |
11.2% |
|
Residue on ignition |
≤ 0.1% |
0.03% |
|
Heavy metals |
≤ 0.001% |
< 0.001% |
|
3-O-Methylmethyldopa |
≤ 0.5% |
0.5% |
|
Residual solvent |
Methanol ≤ 3000ppm |
< 3000ppm |
|
Dichlorometane ≤ 600ppm |
< 600ppm |
|
|
Benzene ≤ 2ppm |
< 2ppm |
|
|
Toluene ≤ 890ppm |
< 890ppm |
|
|
Ethanol ≤ 5000 ppm |
ND |
|
|
Assay |
98.0% ~ 101.0% C8H11N5O3 (on dried basis) |
99.5% |
|
Conclusion：Complies with USP39 standard. |
||
Packaging & Shipping
Methyldopa Packing: 25kg/drum or according to client request
Methyldopa:
1~2 weeks after confirm order.Some of the products can be supplied within 7 days on the strength of EDC warehouse.
Our Services
1. Exporting chemical products from China over 5 years of experience.
2. Arrange the orders and shipping with requests in time, According to the different countries export policy provide complete customs clearance documents..
3. Variety of high quality chemical products with competitive price
FAQ
1. What's your payment terms?
T/T or L/C.
2. What's your delivery time?
Usually we will arrange the shipment in 7 -15 days,due to different products you choose.
3. How about the packing?
Usually we provide the packing as 25 kg / bag or carton,and also as your request bag.
4. How about the validity of the products?
According to the products you ordered.
5. What documents you provide?
Usually, we provide Commerical Invoice, Packing List, Bill of loading, COA , Health certificate and Origin certificate. If your markets have any special requirements, let us know.
6. What is loading port?
Usually is Shanghai,Qingdao or Tianjin.
