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Impurities and reference standards

Avermectin B2A

Also known as Avermectin A1a, 5-O-demethyl-22,23-dihydro-23-hydroxy-, (23S)-, (23S)-5-o-Demethyl-23-hydroxy-22,23-dihydroavermectin a1a, 13-epi-Avm B2

CAS 65195-57-5Formula C48H74O15Molar mass 891.11 g/molEC 810-513-9
GHS signal word: Danger. Pictograms: Acute toxicity (severe) 1 supplier listed
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Avermectin B2A chemical structure, C48H74O15, CAS 65195-57-5
2D chemical structure

Key facts

What buyers check first

All properties
CAS number
65195-57-5
Formula
C48H74O15
Molar mass
891.11 g/mol
EC number
810-513-9
HS code
293220
Category
Impurities and reference standards

What is Avermectin B2A?

Plain description, key identifiers and synonyms

avermectin B2a has been reported in Streptomyces avermitilis.

Identifiers

Registry numbers, names and line notations, tap to copy

IUPAC name
(1R,4S,4'S,5'S,6R,6'R,8R,10E,12S,13S,14E,16E,20R,21R,24S)-6'-[(2S)-butan-2-yl]-4',21,24-trihydroxy-12-[(2R,4S,5S,6S)-5-[(2S,4S,5S,6S)-5-hydroxy-4-methoxy-6-methyloxan-2-yl]oxy-4-methoxy-6-methyloxan-2-yl]oxy-5',11,13,22-tetramethylspiro[3,7,19-trioxatetracyclo[15.6.1.14,8.020,24]pentacosa-10,14,16,22-tetraene-6,2'-oxane]-2-one
CAS number
65195-57-5 CAS number cross-checkedOther or deprecated CAS: 135680-93-2
EC number
810-513-9
Molecular formula
C48H74O15
UNII
FUJ4Z758WB
InChIKey
CWGATOJEFAKFBK-PDVFGPFMSA-N
InChI
InChI=1S/C48H74O15/c1-11-24(2)43-28(6)35(49)22-47(63-43)21-33-18-32(62-47)16-15-26(4)42(25(3)13-12-14-31-23-56-45-40(50)27(5)17-34(46(52)59-33)48(31,45)53)60-39-20-37(55-10)44(30(8)58-39)61-38-19-36(54-9)41(51)29(7)57-38/h12-15,17,24-25,28-30,32-45,49-51,53H,11,16,18-23H2,1-10H3/b13-12+,26-15+,31-14+/t24-,25-,28-,29-,30-,32+,33-,34-,35-,36-,37-,38-,39-,40+,41-,42-,43+,44-,45+,47-,48+/m0/s1
Canonical SMILES
CCC(C)C1OC2(CC3CC(CC=C(C)C(OC4CC(OC)C(OC5CC(OC)C(O)C(C)O5)C(C)O4)C(C)C=CC=C4COC5C(O)C(C)=CC(C(=O)O3)C45O)O2)CC(O)C1C
Isomeric SMILES
CC[C@H](C)[C@@H]1[C@H]([C@H](C[C@@]2(O1)C[C@@H]3C[C@H](O2)C/C=C(/[C@H]([C@H](/C=C/C=C/4\CO[C@H]5[C@@]4([C@@H](C=C([C@H]5O)C)C(=O)O3)O)C)O[C@H]6C[C@@H]([C@H]([C@@H](O6)C)O[C@H]7C[C@@H]([C@H]([C@@H](O7)C)O)OC)OC)\C)O)C

Synonyms

  • Avermectin A1a, 5-O-demethyl-22,23-dihydro-23-hydroxy-, (23S)-
  • (23S)-5-o-Demethyl-23-hydroxy-22,23-dihydroavermectin a1a
  • 13-epi-Avm B2
  • 13-epi-Avm B(sub 2)
  • (13R,23S)-22,23-Dihydro-5-O-demethyl-23-hydroxyavermectin A(sub 1a)
  • Avermectin A(sub 1a), 22,23-dihydro-5-O-demethyl-23-hydroxy-, (13R,23S)-
  • Ivermectin impurity c
  • Ivermectin EP Impurity C, <br>Avermectin B2a
  • Avermectin A1a, 5-O-demethyl-22,23-dihydro-23-hydroxy-, (13R,23S)-

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
891.11 g/molcalc.
Exact mass
890.5028 Dacalc.
LogP (octanol/water)
4.57calc.
Topological polar surface area
190.3 Ųcalc.
Hydrogen bond donors
4calc.
Hydrogen bond acceptors
15calc.
Rotatable bonds
8calc.
Heavy atoms
63calc.
Rings
7calc.
Aromatic rings
0calc.
Fraction sp3 carbons
0.81calc.
Formal charge
0calc.
Stereocentres
21calc.
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=CC(OC3CCC(OC4CCCCO4)CO3)CC=CC=C3COC4CC=CC1C34)OC1(CCCCO1)C2

O=C1OC2CC(CC=CC(OC3CCC(OC4CCCCO4)CO3)CC=CC=C3COC4CC=CC1C34)OC1(CCCCO1)C2

7 rings, 45 atoms.

35 other chemicals share this scaffold

Safety and hazards

GHS classification summary, not a safety data sheet

GHS signal word
Danger
GHS06: Acute toxicity (severe)
Acute toxicity (severe)

Hazard statements

  • H301Toxic if swallowed.
Precautionary statements (7)
  • P264Wash skin thoroughly after handling.
  • P270Do not eat, drink or smoke when using this product.
  • P301 + P316If swallowed: Get emergency medical help immediately.
  • P321Specific treatment (see supplemental first aid instructions on the label).
  • P330Rinse mouth.
  • P405Store locked up.
  • P501Dispose of contents and container in accordance with local regulations.

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

Full safety data and first aid

Avermectin B2A suppliers

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Where suppliers are based

1 supplier in 1 country

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Avermectin B2A price

Indicative price range per kg from live supplier offers

No published prices right now

Suppliers quote this chemical on request. Send one free request and compare quotes side by side.

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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 Avermectin B2A 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 Avermectin B2A is indicative (it was assigned by structure rules). Confirm the classification with your customs broker before shipping.

Frequently asked questions

Quick answers about Avermectin B2A, based on the data on this page

What is Avermectin B2A?

avermectin B2a has been reported in Streptomyces avermitilis.

What is the CAS number of Avermectin B2A?

The CAS registry number of Avermectin B2A is 65195-57-5. Other or deprecated CAS numbers: 135680-93-2.

What is the molecular formula and weight of Avermectin B2A?

The molecular formula of Avermectin B2A is C48H74O15 and its molar mass is 891.11 g/mol.

Is Avermectin B2A hazardous?

Avermectin B2A carries the GHS signal word "Danger". Main hazards: toxic if swallowed. This summary is not an SDS, always read the supplier safety data sheet.

What is the HS code of Avermectin B2A?

Avermectin B2A is usually classified under HS code 293220 (Lactones). This is indicative, confirm it with your customs broker before shipping.

Where can I buy Avermectin B2A?

CompoundList lists 1 supplier of Avermectin B2A in United States. Send one free request to get and compare quotes. Your contact details stay private until you accept a quote.

What is the price of Avermectin B2A?

Suppliers quote Avermectin B2A 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 Avermectin B2A

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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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