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CAS 4221-99-2 (S)-(+)-2-Butanol molecular structure lightbox
CAS RN: 4221-99-2

(S)-(+)-2-Butanol

Product Availability

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9 package records8 with current stock2 grade groups
Batch No.PackageAvailabilityWarehouseInquiry
Batchno.20260119 0.25ml Out of stock Inquiry
Batchno.20250424 1ml In stock Inquiry
Batchno.20251227 5ml In stock Inquiry
Batch No.PackageAvailabilityWarehouseInquiry
Batchno.20250428 1g In stock Shanghai, Shenzhen, Chengdu Inquiry
Batchno.20250611 1ml In stock Shandong, Hebei Inquiry
Batchno.20251121 250mg In stock Shanghai, Tianjin, Chengdu Inquiry
Batchno.20250121 25g In stock Shanghai, Tianjin Inquiry
Batchno.20250903 5g In stock Shanghai, Shenzhen, Tianjin, Chengdu Inquiry
Batchno.20250315 5ml In stock Shandong Inquiry
  • Product code: SSC-150547
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Historical Factory Record

Historical Supply Reference

This product has historical factory records. Recorded pack sizes and purity can be used as a supply reference, while project-specific availability is confirmed by inquiry.

  • Pack sizes on record: 5g
  • Available purity: ≥98%
  • Inventory rows with stock: 0
  • Bulk packaging: confirmed by inquiry
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Reference Pack Sizes

Reference pack sizes are shown below. Final availability, packaging and delivery schedule are confirmed by inquiry.

Recorded sizes, purity and stock details for CAS 4221-99-2
Pack Size Recorded Purity Available Qty Ship From Inquiry
5g ≥98% 0 Out of Stock Hong Kong Inquiry

4221-99-2 / butan-2-ol

Standard CAS: 4221-99-2 Multi CAS: Yes
Basic Information Physical Properties Computed Properties

Basic Information

CAS
4221-99-2
Multi CAS
Yes
Molecular Formula
C4H10O
Molecular Weight
74.120000
Exact Mass
74.073165
InChI
InChI=1S/C4H10O/c1-3-4(2)5/h4-5H,3H2,1-2H3
InChIKey
BTANRVKWQNVYAZ-UHFFFAOYSA-N

Physical Properties

Melting Point
-175 °F (NIOSH, 2024) -114 °C -114.7 °C -115 °C -175 °F
Boiling Point
211 °F at 760 mmHg (NIOSH, 2024) 99.5 °C 99.50 °C. @ 760.00 mm Hg 100 °C 211 °F
Density
0.81 (NIOSH, 2024) - Less dense than water; will float 0.8063 at 20 °C/4 °C 1 MG/L IS EQUIVALENT TO 330 PPM & 1 PPM IS EQUIVALENT TO 3.03 MG/CU M AT 25 °C, 760 MM HG; DENSITY OF SATURATED AIR 1.05 (AIR = 1); 3.14% IN SATURATED AIR @ 30 °C Ratio of specific heats of vapor: 1.080; Saturated liquid density: 50.190 lb/cu ft at 70 °F; Latent heat of vaporization: 243 BTU/lb= 135 cal/g= 5.65X10+5 J/kg; Reid vapor pressure: 0.2 psia Relative density (water = 1): 0.81
Physical Description
Sec-butyl alcohol appears as a clear colorless liquid with an alcohol odor. Flash point below 0 °F. Less dense than water. Vapors heavier than air. Soluble in water. Moderately irritates the eyes and skin. Prolonged and repeated contact may cause defatting and drying of the skin. Vapors may irritate the nose, throat and respiratory tract. May be harmful by ingestion. Liquid Colorless liquid with a strong, pleasant odor; [NIOSH] COLOURLESS LIQUID WITH CHARACTERISTIC ODOUR. Colorless liquid with a strong, pleasant odor.
Appearance
Colorless liquid
State
Liquid

Computed Properties

Structural Parameters

Heavy atom count
5
Fraction Csp3
1
Rotatable bonds
1
H-bond acceptors
1
H-bond donors
1
Molar refractivity
21.97
TPSA
20.23

LogP / Solubility

WLOGP
0.78
MLOGP
0.67
XLogP3
0.6
Consensus LogP
0.68
Log S (ESOL)
-0.72
Class (ESOL)
Very soluble
Log S (Ali)
-0.73
Class (Ali)
Very soluble
Log S (SILICOS-IT)
-0.91
Class (SILICOS-IT)
Very soluble

ADME

GI absorption
High
BBB permeant
Yes
P-gp substrate
No
CYP1A2 inhibitor
No
CYP2C19 inhibitor
No
CYP2C9 inhibitor
No
CYP2D6 inhibitor
No
CYP3A4 inhibitor
No
Log Kp (skin permeation)
-2.62

Drug-likeness / Medicinal Chemistry

Lipinski
Yes
Ghose
No
Veber
Yes
Egan
Yes
Muegge
No
Bioavailability score
0.55
Leadlikeness
No
Synthetic Accessibility
1.5

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