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Melengestrol acetate powder

Rating: SKU: 2919-66-6. Category:

AASraw is with synthesis and production ability from gram to mass order of Melengestrol acetate powder (2919-66-6), under CGMP regulation and trackable quality control system.

Melengestrol acetate powder (INN, BAN) is a steroidal progestin and antineoplastic agent which was never marketed. sometimes abbreviated as MGA. It is not approved for use in humans, and is instead used as a feed additive to promote growth in cattle. and is instead used as an implantable contraceptives for captive animals in zoos and other shelters,..

Product Description


Melengestrol acetate powder video




Melengestrol acetate powder basic Characters


Name: Melengestrol acetate powder
CAS: 2919-66-6
Molecular Formula: C25H32O4
Molecular Weight: 396.52
EINECS: 220-859-7
Synonyms: -20-dione,17-(acetyloxy)-6-methyl-16-methylene-pregna-6-diene-3 ;6-dehydro-16-methylene-6-methyl-17-acetoxyprogesterone ;6-diene-3,20-dione,17-hydroxy-6-methyl-16-methylene-pregna-acetate ;bdh1921 ;mga100 ;mga100(steroid) ;4,6-PREGNADIEN-6-METHYL-16-METHYLENE-17-OL-3,20-DIONE ACETATE;17ALPHA-ACETOXY-6-METHYL-16-METHYLENE-4,6-PREGNADIENE-3,20-DIONE
Melt Point: 202-204 °C(lit.)
Alpha D23 -127° (c = 0.31 in chloroform)
Storage Temp.: 0-6°C
Color: Light yellow powder



More Details On Melengestrol acetate powder you want to know



Melengestrol acetate powder, Heifermax, MGA


What Is The Use Of Melengestrol acetate powder

Melengestrol acetate powder (MGA) is a orally active progestational steroid used to improve growth rate and feed conversion well as to suppress oestrus in beef heifers.They are not approved for use in any species. MGA is the only drug of its kind that is administered in animal feed, The range of approved doses is 0.25 to 0.50 mg/heifer/day. Melengestrol acetate powder is fed for the duration of fattening/finishing period, usually 90 to 150 days. Amandatory withdrawal of 2 days before slaughter is applied to any animal that is administered MGA.

Melengestrol acetate powder has been previously evaluated at the 54th meeting of the Committee, and temporary maximum residue limits (MRLs) were recommended. These temporary MRLs were 5 µg/kg for bovine fat and 2 µg/kg for bovine liver.In reaching its decision on MRLs, the Committee took into consideration the following factors:
– An ADI of 0-0.03 µg/kg of body weight was established, which is a equivalent to a maximum ADI of 1.8 µg for a
60-kg person.
– Only fat and liver contain concentrations of the marker residue that are quantifiable on a routine basis; methods
with limits of quantification greater than 0.3 µg/kg are unlikely to permit quantification of residues in muscles from
animals treated with recommended doses of Melengestrol acetate powder.
– The sponsors did not submit an analytical method suitable for monitoring purposes.
Therefore, the Committee recommended temporary MRLs and requested the following information:
– A analytical method suitable for quantifying residues of Melengestrol acetate powder in liver and fat tissues.

In response to the Committee’s request, the sponsor provided a validated chemical method for evaluation by the 58th
JECFA meeting.


Is Melengestrol acetate powder effective

The effect of oral menningenyl acetate (MGA) on ovarian activity has been studied in 264 dairy and cow heifers. A total of 98 heifers received 0.4 mg MGA daily for a short period of time (18 to 32 days), and the activity of the ovary was determined by rectal palpation. As the incidence of detectable corpus luteum decreased from 76% to 10%, the detectable follicle incidence increased from 56% to 91%. Hair follicle size also increases over time. Cervical mucus samples were scored according to fern type, which was interpreted as due to estrogenic effects and occurred during corpus luteum degradation, even though estrus and ovulation were inhibited by MGA treatment.

A total of 166 cow heifers were used in a long-term study of MGA treatment (105 to 116 days). A significant (P < 0.05) increase was found in the weight of follicular fluid, mainly from the largest follicles of this pair of ovaries. Increased estrogen levels also indicate puberty, and adrenal weights in intact MGA-treated heifers increase. After treatment with MGA, the adrenal weight of the jetted heifers tends to decrease. The optimal dose for increasing follicular activity seems to be close to 0.4 mg of MGA daily/heifer.


Warning on Melengestrol acetate powder

  • Keep away from food, drink and animal feeding stuffs.
  • Do not empty into drains.
  • This material and its container must be disposed of in a safe way.
  • Wear suitable protective clothing.
  • Wear suitable gloves.
  • clean the floor and all objects contaminated by this material, use water and detergent.
  • If swallowed, IMMEDIATELY contact Doctor or Poisons Information Center. (show this container or label).
  • Avoid exposure – obtain special instructions before use.
  • Dispose of this material and its container at hazardous or special waste collection point.
  • Use appropriate container to avoid environmental contamination.
  • Avoid release to the environment. Refer to special instructions/Safety data sheets.


Melengestrol acetate powder

Min order 10grams.
The inquiry on normal quantity(Within 1kg) can be sent out in 12 hours after payment.
For larger order(Within 1kg)can be sent out in 3 working days after payment.


Melengestrol acetate powder Marketing

To be provided in the coming future



How to buy Melengestrol acetate powder from AASraw


1.To contact us by our email inquiry system,or online skypecustomer service representative(CSR).
2.To provide us your inquired quantity and address.
3.Our CSR will provide you the quotation, payment term, tracking number, delivery ways and estimated arrival date(ETA).
4.Payment done and the goods will be sent out in 12 hours(For order within 10kg).
5.Goods received and give comments.