Name: Sodium bicarbonate CAS No.: 144-55-8 Appearance: White powder or opaque monoclinic system fine crystals Molecular formula: CHNaO3 Molecular Weight: 84.01 Melting point:>300 °C(lit.) PACKAGE:25KG/BAG
Name: Dichroromethylvinylsilane CAS number: 124-70-9 Molecular formula: C3H6Cl2Si Molecular weight: 141.07 EINECS number: 204-710-3 Mol file: 124-70-9.mol
Name: Vinyltrimethylsilane CAS number: 754-05-2 Molecular formula: C5H12Si Molecular weight: 100.23 EINECS number: 212-042-9 Mol file: 754-05-2.mol
Name: Ethoxydimethylvinylsilane CAS number: 5356-83-2 Molecular formula: C6H14OSi Molecular weight: 130.26 EINECS number: 226-341-7 Mol file: 5356-83-2.mol
Name: CHLORODIMETHYLPINYLSILANE CAS number: 1719-58-0 Molecular formula: C4H9ClSi Molecular weight: 120.65 EINECS number: 217-007-1 Mol file: 1719-58-0.mol
Name: 1,1,3,3-TETRAMETHYL-1,3-DIVINYLDISILAZANE CAS number: 7691-02-3 Molecular formula: C8H19NSi2 Molecular weight: 185.41 EINECS number: 231-701-1 Mol file: 7691-02-3.mol
Dear Customer: Hello! Thank you for your continued support for our company. The National Day is coming. In order to allow our employees to enjoy this important holiday, we will make the following adju...
Name: Erythromycin
CAS No.: 114-07-8
Appearance: white or milky white crystal or powder
Molecular formula: C37H67NO13
Molecular Weight: 733.9268
Density: 1.2g/cm3
Melting point: 138-140℃
Boiling point: 818.4°C at 760 mmHg
Flash point: 448.8°C
Vapor pressure: 4.94E-31mmHg at 25°C
Name: Erythromycin
CAS No.: 114-07-8
Appearance: white or milky white crystal or powder
Molecular formula:C37H67NO13
Molecular Weight: 733.9268
Density: 1.2g/cm3
Melting point: 138-140℃
Boiling point: 818.4°C at 760 mmHg
Flash point: 448.8°C
Vapor pressure: 4.94E-31mmHg at 25°C
Description:
Erythromycin CAS NO.114-07-8 is a macrolide antibiotic. It is a white or light yellow-white crystalline powder. It is odorless and bitter. It is hygroscopic in the air. It is easily soluble in ethanol, chloroform, acetone and ether. It is slightly soluble in water. . The solubility increases after salt formation. It is relatively stable in a dry state, and the aqueous solution is relatively stable under refrigeration, and the potency gradually decreases at room temperature. It is unstable when exposed to acid, and is relatively stable when slightly alkaline, and its potency is significantly reduced below pH4. MP 135-140°C (decomposition), specific rotation -70～78°(2%, ethanol solution).
Application:
Erythromycin CAS NO.114-07-8 is a macrolide antibiotic. Its antibacterial spectrum is similar to that of penicillin. It is resistant to Gram-positive bacteria, such as Staphylococcus, Streptococcus pyogenes, Streptococcus viridans, Streptococcus pneumoniae, Streptococcus faecalis, Streptococcus hemolyticus, and Clostridium. Bacillus sp It also has a certain inhibitory effect on Gram-negative bacteria, such as Neisseria gonorrhoeae, Helicobacter, Pertussis, Brucella, Legionella, Meningococcus, Haemophilus influenzae, Bacteroides, some Shigella and Escherichia coli. In addition, it has an inhibitory effect on mycoplasma, actinomycetes, spirochetes, rickettsiae, chlamydia, nocardia, a small number of mycobacteria and amoeba. Staphylococcus aureus and other Staphylococcus and Streptococcus bacteria are easily resistant to this product. It is characterized by strains that are resistant to penicillin and are sensitive to the product.
Specification:
|
Tests items |
Acceptance criteria |
Results |
|
|
Appearance |
White or slightly yellow powder or colorless or slightly yellow crystals |
White powder |
|
|
IR Identification |
Infrared spectrum is concordant with that of the reference standard |
Conforms |
|
|
Related substances |
Impurity A |
Not more than 2.0% |
0.66% |
|
Impurity B |
Not more than 2.0% |
0.63% |
|
|
Impurity C |
Not more than 3.0% |
0.90% |
|
|
Impurity D |
Not more than 1.0% |
0.17% |
|
|
Impurity E |
Not more than 1.0% |
0.02% |
|
|
Impurity F |
Not more than 1.0% |
0.001% |
|
|
Impurity H |
Not more than 1.0% |
0.007% |
|
|
Impurity L |
Not more than 0.4% |
0.009% |
|
|
Impurity M |
Not more than 1.0% |
0.08% |
|
|
Any other impurity |
Not more than 0.4% |
0.10% |
|
|
Total impurities |
Not more than 7.0% |
2.5% |
|
|
Thiocyanate |
Not more than 0.3% |
0.02% |
|
|
Water |
Not more than 6.5% |
0.5% |
|
|
Sulfated ash |
Not more than 0.2% |
0.03% |
|
|
Assay (On anhydrous substance) |
Erythromycin B |
Not more than 5.0% |
0.34% |
|
Erythromycin C |
Not more than 5.0% |
0.91% |
|
|
Erythromycin (A+B+C) |
93.0%~102.0% |
97.2% |
|
|
Residual Solvent: Methylene chloride |
Not more than 600ppm |
NDppm |
|
|
Microbial Limit |
Total Aerobic Microbial Count |
Not more than cfu103/g |
-CFU/g |
|
Total Yeast/Mold Count |
Not more than cfu102/g |
- CFU/g |
|
Package:
Payment Method: L/C、D/A、T/T
Shipping Ports: Shanghai, Ningbo, Qingdao, Tianjin And Other Ports In China.
Type Of Shipping: Express、Ocean freight、Land freight、Air freight
Our Service:
1. Reply within 12 hours.
2. High-quality products and the most reasonable price
3. Data and chemical technology support.
4. Professional team service
5. Customiszed production for different package
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