CAS No: 112809-51-5
Molecular formula: C17H11N5
Molecular weight: 285.3
Appearance: White power
Assay: 99%
Delivery time:
Minimum order: 100g
Supply ability: 5000kg/month
Quality standard: USP32
Payment: T/T, Western Union and Money Gram
Delivery: Within 24hours After Your Payment
Usage: antineoplastic drug,Letrozole is a new generation of selective aromatase inhibitors, for the artificial synthesis of benzyl triazole derivative, inhibit aromatase, decreased estrogen levels, thereby eliminating stimulation of estrogen on tumor growth.
Tests | Specifications | Results |
Appearance | White or off-white crystaline powder | White
Crystalline powder |
Solubility
|
Soluble in Chloroform;
Soluble in ethanol when heated |
Conform |
ldentification | (1)Maximum absorption in wavelength of 240 nm
Minimum absorption in wavelength of 215 nm |
Conform
Conform |
(2)Infrared spectrum should be in accordance
the dominant peak of contrast |
In accordance with the dominant
peak of contrast |
|
Melting points | 182°C-184°C | 182°C |
Related substances | ≤0.5% | 0.3% |
Single impurity | ≤0.3% | 0.2% |
Loss on drying | ≤1.0% | 0.8% |
[Assay]C17H11N5
(On anhydrous basis) |
≥98.0% | 99.2% |
Conclusion | Conforms Specifications of USP35 |
Hjtc (Xiamen) Industry Co., Ltd.
Xiamen Huayongjian Biotechnology Co., Ltd.
Contacts: June & Eason
Whatsapp:+8618206063252; +8618759200098
E-mail: eastern002@126.com;
eason_hjtc@126.com
Web site:https://www.steroidpowder-hjtc.com/
http://www.safeststeroid.com/
http://www.glassviallabels.com/
https://hjtc-printing.en.made-in-china.com/
There are two entirely different stories to be found on the aromatase inhibitor letrozole.
In medical studies measuring blood estradiol and testosterone levels of hundreds of individuals, letrozole is a very consistent-performing drug with almost no unusual behavior. The only unusual behavior to be found in scientific literature is in a very early publication by the pharmaceutical manufacturer which made it appear unbelievably potent, but left out many details. All other studies have shown rather ordinary and consistent potency.
My own findings over more than 10 years have matched up with these results.
The other story will be that even trace doses of letrozole will “obliterate” estrogen and that it’s very tricky to use for this reason.
Obviously, if that’s your personal experience using a given letrozole product, go by your experience. If however you are new to letrozole or have used it successfully before, then I recommend that you consider it no greater in dosing difficulty than any other aromatase inhibitor (AI), as this is my experience with very many individuals.
How much letrozole to use? As with all AI’s, there’s significant personal variation, where a significant number of users need only about half as much as most, and a few need even less. In all cases, dosing must be individually judged based on observed side effects, and preferably based on blood testing as well. But as a general guideline, I recommend about 0.36 mg/day as a base amount for an anabolic steroid cycle with a modest amount of aromatizable steroids, such as 200-300 mg/week testosterone. At a higher dose such as 750 mg/week, this amount will usually be doubled. Generally no more than 1 mg/day should be taken unless blood testing shows abnormally high estradiol even at that level, but that’s rarely the case.
Overdosing will result in low estradiol levels, which may result in adverse side effects of loss of libido, depression, joint pain, or flat-appearing musculature. If underdosed while using aromatizable steroids such as testosterone or Dianabol, abnormally high estradiol also can cause loss of libido or depression, can cause water retention, and can cause or aggravate gynecomastia.
Where experiencing depression or loss of libido as the only observed side effects and unsure if the problem is from underdosing or overdosing, blood testing is the best way to resolve the question. Simply changing dose and observing the result can be another way.
When wishing to reduce dosing of letrozole, it’s important to account for the drug’s two-day half life. Because of buildup in the body, if you simply reduce dose the result won’t be fully seen for more than a week! Yet you have a problem that should be corrected promptly.
Instead, allow levels to drop during a short break. If for example you wish to cut dosing in half, take two days off entirely, and then begin your reduced dose. Or, if you wish to reduce dose by 25%, take one day off and then start the new dosing.
When beginning letrozole use, its half life also should be accounted for. In general, when using letrozole on an ongoing basis, when taking a dose your body will have in it not only the dose you just took, but two days’ worth of doses built up in it as well. If on the first day of use you take only one dose, you won’t have as much in your system as you need. Instead, take 3 doses’ worth on the first day, and after that use your regular daily dosing. This will promptly get blood levels where they need to be. If you do not do this, then it will take about two weeks for blood levels to build up fully.
Applications:
Letrozole use during anabolic steroid cycles should generally be discontinued at the end of the last week of the cycle. However, if you know from experience that when off-cycle a given amount of letrozole optimizes your estradiol levels, then dosing may be changed to that amount rather than discontinued.
As suggested above, in some instances an individual may have overly high estrogen while not usinganabolic steroids.
Letrozole can work extremely well to normalize estradiol in these instances. For most men, 20-29 pg/mL estradiol is the ideal range to aim for, though a few feel better in the 30’s. The amount of letrozole needed will depend on the amount of correction needed. Where estradiol is well above the target range, 0.36 mg/day is a good starting estimate. Where only modest reduction is needed, half that amount can be an appropriate starting point.
While available as tablets, letrozole is now more commonly available in liquid form as a research chemical. Care must be taken in measurement of liquid amounts: additionally, as letrozole is usually provided as a suspension, products must be thoroughly shaken before dispensing. It may be that many of the reports of unpredictable results are due to inaccurate measurement by either the user or provider, or from clumping of product.
Product name | Letrozol Femara powder | |
Items | Specifications | Results |
Appearance | White or off-white powder | White powder |
Identification | FT-IR,HPLC,NMR,Mass | Confirm |
Water | ≤0.3% | 0.20% |
Melting point | 180℃ - 184℃ | 182.1℃ |
Residue on ignition | ≤0.1% | 0.06% |
Heavy metals | ≤10 ppm | Confirm |
Related substances | ||
4, 4'- (1H-1,3,4-triazol-1-ylmetyhlene) dibenzonitrile | ≤0.3% | Confirm |
4, 4'4"- Methylidenen-trisbenzonitrile | ≤0.2% | Confirm |
Any other single impurity | ≤0.1% | Confirm |
Total impurities | ≤0.3% | 0.1% |
Residual Solvent (Meets the requirements of ICH) | ||
Acetone | ≤5000 ppm | 480 pp0m |
Bulk density (tapped) | 0.3 g/ml - 0.7 g/ml | 0.37 g/ml |
Assay | 98.0% - 102.0% | 99.9% |
Q1: Have your Product Quality been Approved by Third Party Lab?
A: Yes, All products are strictly tested by our QC, confirmed by QA and approved by third party lab in China, USA, Canada, Germany, UK, Italy, France etc. So you will be assured with Good Quality if you choose us.
Q2:How do you treat quality complaint?
A:First of all, our QC department will do strict examination of our export products by HPLC, UV, GC , TLC and so on in order to 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.
Q3: Is there any discount?
A: Yes, for larger quantity, we always support with better price.
Q4:How long does it take to the goods arrived?
A:It is Depending on your location.
Q5 Do you have any reshipment policy?
A: We have good after-sale service and re-shipment policy if the parcel lose. Our long association with our clients has brought great benefits. We always take the upmost care in the packaging of our products . Our clients will confirm this as even they struggle to find them without help at times. But in spite of our best efforts it is still possible will seize a small number of packages.
In this circumstance we promise reship free to establish long term relationship.
Our Advantages / The 7 reasons are as below: |
||
1 |
Rich experience |
Our company is a professional leading supplier in pharmaceutical and chemical area for many years. |
2 |
Suitable packagings |
The packing suits you best would be choosen to cross customs safely. Or if you have your own ideal way, it could be also taken in consideration |
3 |
High quality |
High quality guaranteed, product is tested before shipment. |
4 |
Secure shipping |
Shipping by professional forwarder Security EMS/DHL/TNT/FedEx/UPS,AusPost, |
Royal Mail express,etc.Door to door service. |
||
5 |
Fast delivery |
We have stock, so we can deliver quickly once payment isreceived. |
6 |
Quality service |
Warm aftersale service is supplied,if any question we |
will reply you within 8 hours. |
||
7 |
Competitive prices |
A discount would be given when you make a large order. VIP price for next orders. |
1kg/aluminum foil bag
1kg/ aluminium tin
25kg/drum
25kg/ aluminum drum
delivery time: usually within 3-5 working days after confirming the payment.
shipping details:dhl; tnt; ups or ems
1. We will ship the goods within 8hrs after get your payments. If you want to cancel or change order, please tell me within 24hours after you finish the payment...So we both can make the best of the bad bargain.
2.We will ship the goods that you order from us by EMS, DHL, UPS, or FedEx.We will decided to choose which courier depend on Different countries.To find the best way to delivery the goods for you.
3. you can get the goods with in 4-7days usually.If the goods were lost or not received for other reasons, please contact me Immediately.
Testosterone Series |
||
Item |
Product name |
Standard/Purity |
1 |
Testosterone Acetate |
99%+ |
2 |
Testosterone Cypionate |
USP |
3 |
Testosterone Decanoate |
BP |
4 |
Testosterone Enanthate |
USP |
5 |
Testosterone Isocaproate |
BP |
6 |
Testosterone Phenylpropionate |
BP |
7 |
Testosterone Propionate |
USP |
8 |
Testosterone Undecanoate |
CP |
9 |
Methyl Testosterone |
USP |
10 |
Sustanon |
99%+ |
11 |
4-Chlorotestosteron acetate |
99%+ |
Nandrolone Series |
||
Item |
Product name |
Standard/Purity |
1 |
Nandrolone Cypionate |
98%+ (Liquid) |
2 |
Nandrolone Decanoate |
USP |
3 |
Nandrolone Enanthate |
98%+ (Liquid) |
4 |
Nandrolone Phenylpropionate |
USP |
5 |
Nandrolone Undecanoate |
98.5%+ |
Boldenone Series |
||
Item |
Product name |
Standard/Purity |
1 |
Boldenone Acetate |
98.5%+ |
2 |
Boldenone Cypionate |
98.5%+ |
3 |
Boldenone Undecylenate |
98.5%+ (Liquid) |
Drostanolone Series |
||
Item |
Product name |
Standard/Purity |
1 |
Drostanolone Enanthate |
98.5%+ |
2 |
Drostanolone Propionate (Masteron) |
98.5%+ |
Trenbolone Series |
||
Item |
Product name |
Standard/Purity |
1 |
Trenbolone Acetate |
USP |
2 |
Trenbolone Enanthate |
98.5%+ |
3 |
Trenbolone Hexahydrobenzyl Carbonate |
98.5%+ |
Methenolone (Metenolone) Series |
||
Item |
Product name |
Standard/Purity |
1 |
Methenolone Acetate |
98.5%+ |
2 |
Methenolone Enanthate |
98.5%+ |
Others |
||
Item |
Product name |
Standard/Purity |
1 |
Fluoxymesterone |
USP |
2 |
Mesterolone |
BP |
3 |
Methandrostenolone |
98.5%+ |
4 |
Oxymetholone (Anadrol) |
USP |
5 |
Oxandrolone (Anavar) |
USP |
6 |
Stanozolol (Winstrol) |
USP |
7 |
Stanolone |
98.5%+ |
Men Sex improving products |
||
Item |
Product name |
Standard/Purity |
1 |
Tadalafil (Cialis) |
99.5%+ |
2 |
Vardenafil (Levitra) |
99%+ |
3 |
Hongdenafil |
99.9%+ |
4 |
Jin Yang Jian |
99.5%+ |
Weight loss products |
||
Item |
Product name |
Standard/Purity |
1 |
Sibutramine |
99%+ |
2 |
Babutramine |
99%+ |
3 |
Rimonabant |
99.5%+ |
4 |
Citilistat |
USP28/98.5%+ |
Q1: Have your Product Quality been Approved by Third Party Lab?
A: Yes, All products are strictly tested by our QC, confirmed by QA and approved by third party lab in China, USA, Canada, Germany, UK, Italy, France etc. So you will be assured with Good Quality if you choose us.
Q2:How do you treat quality complaint?
A:First of all, our QC department will do strict examination of our export products by HPLC, UV, GC , TLC and so on in order to 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.
Q3: Do you Accept Sample Order?
A: Yes, we accept small order from 10g, 100g and 1kg for your evaluation quality of our goods.
Q4: Is there any discount?
A: Yes, for larger quantity, we always support with better price.
Q5:Do you accept VISA business credit card ?
A:Sorry we don't accept VISA credit card,
We'd like to accept bank transfer, or Paypal or Moneygram
Q6:How long does it take to the goods arrived ?
A:It is Depending on your location,
For small order, please expect 5-7 days by DHL,UPS,TNT, FEDEX, EMS.
For mass order, please allow 5-8 days by Air, 20-35 days by Sea.
Q7. Do you have any reshipment policy ?
we have good after-sale service and re-shipment policy if the parcel lose
Our long association with our clients has brought great benefits
We always take the upmost care in the packaging of our products
our clients will confirm this as even they struggle to find them without help at times.
But in spite of our best efforts it is still possible will seize a small number of packages.
In this circumstance we promise reship free to establish long term relationship
Q8 :Can I get a sample?
A: Of course. For most products we can provide you a free sample, while the shipping cost should
undertake by your side.
As a leading manufacturer of steroid raw materials,and Peptides
We specialized in manufacturing high quality and reliable raw material
which are widely used in the fields of food, health, cosmetics, pharmaceuticals, and Bodybuilding
we have formed a technology and management team that cooperate closely with some overseas Labs all speak highly of our safe shipping and goods .
please do not hesitate to contact us.