China (Mainland)
High quality Letrozole CAS NO.112809-51-5
- FOB Price: USD: 1.00-1.00 /Kilogram Get Latest Price
- Min.Order: 1 Kilogram
- Payment Terms: L/C,D/A,D/P,T/T,MoneyGram
- Available Specifications:
1(1-2)Kilogram
- Product Details
Keywords
- Letrozole
- 112809-51-5
- Letrozole 112809-51-5
Quick Details
- ProName: High quality Letrozole
- CasNo: 112809-51-5
- Molecular Formula: C17H11N5
- Appearance: White powder
- Application: Used
- DeliveryTime: 3 days
- PackAge: sample package
- Port: Qingdao Port
- ProductionCapacity: 1000 Kilogram/Week
- Purity: 99%
- Storage: dry and cool
- Transportation: By air
- LimitNum: 1 Kilogram
- Shelf life: 2 years
- Application: Used
Superiority
1.Reasonable price:
We provide high quality products with competitive price in china,
2.Low moq:
No worry about the low moq, our moq is 1 gram or lower.
3.Good and efficient service,Fast Delivery
Fast respond save client's time, we promise to reply inquiry in 24 hours including holidays and send quotation sheet and other documents in 48 hours.
4.Super-good quality
We have strict quality control system .Good reputation in Market
Contact us
If you have any further questions or need a sample,Please do not hesitate to contact us.
Leah| Senior Sales | Qingdao Sigmachemical Co.,Ltd
| Address:No 70,Shandong Road,Qingdao city,China
Details
Specifciation:
1.Competitive price
2.Fast Delivery Within 2 days
3.SGS , BV, GMP,ISO approve
4.Professional factory
Product Description
product name:letrozole
alias: femara, letrozole, trozet
cas registry number:112809-51-5
purity: 98%
mf: c17h11n5
mw: 285.3
character: white crystalline powder.
delivery: ems, dhl, tnt, fedex, ups
other drugs in same class:anastrozole,letrozole,tamoxifen citrate,exemestane
usage: letrozole is a powerful aromatase inhibitor that was developed to fight breast cancer. for athletes and bodybuilders, it is a drug used to combat the estrogenic side effects of anabolic steroids water-retention, acne and gynocomastia. it will also raise testosterone levels because of the lowered estrogen in the body. side effects from letrozole include a lowered sex drive and continuous use can lead to lowered lipid function and an impaired immune system.
Certification of Analysis
| tests | specifications | results |
| appearance | white or off-white crystaline powder |
white |
|
solubility |
soluble in chloroform; |
conform |
| ldentification |
(1)maximum absorption in wavelength of 240 nm |
conform |
| (2)infrared spectrum should be in accordance the dominant peak of contrast | in accordance with the dominant peak of contrast | |
| melting points | 182℃-184℃ | 182℃ |
| related substances | ≤0.5% | 0.3% |
| single impurity | ≤0.3% | 0.2% |
| loss on drying | ≤1.0% | 0.8% |
|
[assay]c17h11n5 |
≥98.0% | 99.2% |
| conclusion | usp33 | |
Function&Application
letrozole has been used for ovarian stimulation by fertility doctors since 2001 because it has fewer side-effects than clomiphene (clomid) and less chance of multiple gestation. a canadian study presented at the american society of reproductive medicine 2005 conference suggested that letrozole may increase the risk of birth defects.[citation needed] a more detailed ovulation induction follow-up study found that letrozole, compared with a control group of clomiphene, had significantly lower congenital malformations and chromosomal abnormalities at an overall rate of 2.4% (1.2% major malformations) compared with clomiphene 4.8% (3.0% major malformations). despite this, india banned the usage of letrozole in 2011, citing potential risks to infants.in 2012, an indian parliamentary committee said that the drug controller office colluded with letrozole's makers to approve the drug for infertility in india and also stated that letrozole's use for infertility was illegal worldwide; however, such off-label uses are legal in many countries such as the us and uk.
the anti-estrogen action of letrozole has been shown to be useful in pretreatment for termination of pregnancy, in combination with misoprostol. it can be used in place of mifepristone, which is expensive and unavailable in many countries.
letrozole is sometimes used as a treatment for gynecomastia, although it is probably most effective at this if caught in an early stage (such as in users of anabolic steroids).
letrozole has also been shown to delay the fusing of the growth plates in mice.when used in combination with growth hormone, letrozole has been shown effective in one adolescent boy with a short stature
2.Fast Delivery Within 3 days
3.SGS,BV,GMP,ISO approve
4.Professional factor
The aim of Sigma is a quality policy that "Elements in the system all have been satisfied, Personnel has been trained; Every batch of material is checked, Each procedure guarantees the quality; Every bag of our products is top grade, Service is thoughtful all the time, quality and reputation to increase market share and promote enterprise development. The quality, colors and forms of our products have reached a high level in related chemical industry, which relies on characteristic and advanced processing technology and it has gained a high and reliable reputation from customers at both quality and services.
Sigma has become the "Top 500 Chinese manufactur
Our Services
FAQ
Q1: Are you a manufacturer
Answer: Yes, we are factory founded on 2002.
Q2: How to contact with us
Click the lookchem"Contact Supplier" And then send us message the product you interest in, you will get reply within 24 hours.
Q3:Which kind of payment terms do you accept
For small order,you can pay by T/T, or Paypal,nomal order by T/T to our company account
Q4:Can you give me a discount price
Surely,It depend on your qty
Q5:How can i get a sample
free samples is available,but freight charges will be at your account and the charges will be return to you or deduct from your order in the future.
Q6: How to confirm the Product Quality before placing orders
A:You can get free samples for some products,you only need to pay the shipping cost or arrange a courier to us and take the samples. You can send us your product specifications and requests,we will manufacture the products according to your requests.
Q7:How do you treat quality complaint
A:First of all, our quality control will reduce the quality problem to near zero. If there is a real quality problem caused by us, we will send you free goods for replacement or refund your loss.
If you are interested,welcome to contact with us.
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