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Impurities and reference standards

Milbemycin beta1

Also known as Milbemycin B, 25-methyl-, (25R)-, Antibiotic B 41A1, (25R)-25-Methylmilbemycin B

CAS 51596-16-8Formula C32H48O7Molar mass 544.73 g/mol
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Milbemycin beta1 chemical structure, C32H48O7, CAS 51596-16-8
2D chemical structure

Key facts

What buyers check first

All properties
CAS number
51596-16-8
Formula
C32H48O7
Molar mass
544.73 g/mol
HS code
293220
Category
Impurities and reference standards

What is Milbemycin beta1?

Plain description, key identifiers and synonyms

Milbemycin beta1 is a chemical substance with the molecular formula C32H48O7 and a molar mass of 544.73 g/mol. Its CAS registry number is 51596-16-8. The IUPAC name is (1S,4R,5'S,6'R,7S,9S,10E,12E,14R,16E,19R,21R)-9-hydroxy-10-(hydroxymethyl)-7-methoxy-5',6,6',14,16-pentamethylspiro[2,20-dioxatricyclo[17.3.1.04,9]tricosa-5,10,12,16-tetraene-21,2'-oxane]-3-one.

Identifiers

Registry numbers, names and line notations, tap to copy

IUPAC name
(1S,4R,5'S,6'R,7S,9S,10E,12E,14R,16E,19R,21R)-9-hydroxy-10-(hydroxymethyl)-7-methoxy-5',6,6',14,16-pentamethylspiro[2,20-dioxatricyclo[17.3.1.04,9]tricosa-5,10,12,16-tetraene-21,2'-oxane]-3-one
CAS number
51596-16-8
Molecular formula
C32H48O7
UNII
112V7HX15Q
InChIKey
GVTIOOAINDAZRR-QKOZJOJASA-N
InChI
InChI=1S/C32H48O7/c1-20-8-7-9-25(19-33)32(35)18-29(36-6)23(4)15-28(32)30(34)37-27-16-26(11-10-21(2)14-20)39-31(17-27)13-12-22(3)24(5)38-31/h7-10,15,20,22,24,26-29,33,35H,11-14,16-19H2,1-6H3/b8-7+,21-10+,25-9+/t20-,22-,24+,26+,27-,28-,29-,31-,32+/m0/s1
Canonical SMILES
COC1CC2(O)C(CO)=CC=CC(C)CC(C)=CCC3CC(CC4(CCC(C)C(C)O4)O3)OC(=O)C2C=C1C
Isomeric SMILES
C[C@H]1CC[C@]2(C[C@@H]3C[C@H](O2)C/C=C(/C[C@H](/C=C/C=C(/[C@@]4(C[C@@H](C(=C[C@H]4C(=O)O3)C)OC)O)\CO)C)\C)O[C@@H]1C

Synonyms

  • Milbemycin B, 25-methyl-, (25R)-
  • Antibiotic B 41A1
  • (25R)-25-Methylmilbemycin B
  • Meilingmycin D
  • Milbemycin Oxime Impurity 13
  • (+)-Milbemycin beta1
  • 25alpha-methylmilbemycin b

Physical and chemical properties

Measured values and descriptors computed from the structure

Physical and chemical properties

Measured values, check the supplier specification for your grade

No measured properties are recorded for this substance yet. Ask suppliers for a technical data sheet.

Values vary by grade. Ask suppliers for the COA or TDS of the batch you buy.

Computed descriptors

Calculated from the structure, useful for screening and formulation

Molecular weight
544.73 g/molcalc.
Exact mass
544.34 Dacalc.
LogP (octanol/water)
5.17calc.
Topological polar surface area
94.45 Ųcalc.
Hydrogen bond donors
2calc.
Hydrogen bond acceptors
7calc.
Rotatable bonds
2calc.
Heavy atoms
39calc.
Rings
4calc.
Aromatic rings
0calc.
Fraction sp3 carbons
0.72calc.
Formal charge
0calc.
Stereocentres
9calc.
Lipinski rule of five
Fails (2 violations)calc.

Calculated for screening. Confirm critical figures with the supplier.

Murcko scaffold

The ring system that remains when every side chain is removed

Murcko scaffold of this chemical, O=C1OC2CC(CC=CCCC=CC=CC3CCC=CC13)OC1(CCCCO1)C2

O=C1OC2CC(CC=CCCC=CC=CC3CCC=CC13)OC1(CCCCO1)C2

4 rings, 29 atoms.

3 other chemicals share this scaffold

Safety and hazards

GHS classification summary, not a safety data sheet

No GHS hazard classification is recorded for this substance yet. That does not mean it is harmless.

GHS classification summary, not a safety data sheet (SDS). Classifications can differ by supplier, grade and concentration. Always check the supplier's SDS.

Milbemycin beta1 suppliers

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Milbemycin beta1 price

Indicative price range per kg from live supplier offers

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Uses and applications

What the substance is used for, by industry and function

Applications are not documented for this substance yet. Suppliers often describe uses on their product pages, linked in the suppliers list above.

Regulatory status

Inventories, regulations and trade controls that list this substance

No regulatory list memberships are recorded for this substance yet. Always check the rules of the importing and exporting country before trade.

HS code and trade data

Customs classification and reported world trade statistics

Global trade

World import and export statistics for the HS code Milbemycin beta1 is traded under.

HS 2932.20Indicative HS code

Lactones

World exports in 2024
$1.97B
−4.7% vs 2023, imports $2.07B
2019 to 2024
Top exporters
  1. China56.3%
  2. India * partner reported7.4%
  3. Germany7.3%
Top importers
  1. United States14.2%
  2. India * partner reported13.5%
  3. Brazil8.5%

* Partner reported figures, a lower bound.

Reported customs values in USD, not prices.Full trade data

The HS code shown for Milbemycin beta1 is indicative (it was assigned by structure rules). Confirm the classification with your customs broker before shipping.

Frequently asked questions

Quick answers about Milbemycin beta1, based on the data on this page

What is Milbemycin beta1?

Milbemycin beta1 is a chemical substance with the molecular formula C32H48O7 and a molar mass of 544.73 g/mol. Its CAS registry number is 51596-16-8.

What is the CAS number of Milbemycin beta1?

The CAS registry number of Milbemycin beta1 is 51596-16-8.

What is the molecular formula and weight of Milbemycin beta1?

The molecular formula of Milbemycin beta1 is C32H48O7 and its molar mass is 544.73 g/mol.

Is Milbemycin beta1 hazardous?

No GHS hazard classification for Milbemycin beta1 is recorded on CompoundList yet. That does not prove it is safe. Always read the supplier safety data sheet.

What is the HS code of Milbemycin beta1?

Milbemycin beta1 is usually classified under HS code 293220 (Lactones). This is indicative, confirm it with your customs broker before shipping.

Where can I buy Milbemycin beta1?

Post a free request on CompoundList and suppliers of Milbemycin beta1 will send you quotes. Your contact details stay private until you accept a quote.

What is the price of Milbemycin beta1?

Suppliers quote Milbemycin beta1 on request because prices depend on grade, purity, quantity and destination. A free request on CompoundList gets you several quotes to compare.

Guides for buyers

Practical guides that help when you source, ship or handle Milbemycin beta1

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Data last updated 7 Oct 2026. Details may have changed, please confirm them with the supplier. Report an error on this page
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