Gas Data
MOLECULAR WEIGHT:	88.150
DENSITY:	2.487 kg/m3 @ 20ºC 101.325 kPa
DENSITY:	0.1553 lb/ft3 @ 68ºF, 14.696 psi
SPECIFIC VOLUME:	0.402 m3/kg @ 20ºC 101.325 kPa
SPECIFIC VOLUME:	6.4432 ft3/lb @ 68ºF, 14.696 psi
VP @21.1C (kPa):	313.02
VP @70F (PSIA):	45.4

 

Safety Information
LFL IN AIR:	1.8%
UFL IN AIR:	8.4%

 

Shipping Information
CAS NUMBER:	75-28-5
I.D. NUMBER:	UN 1969
DOT PROPER NAME:	ISOBUTANE
TC PROPER NAME:	ISOBUTANE
HAZARD CLASS:	2.1
LABEL:	FLAMMABLE GAS

 

Cylinder Specifications
Cylinder Size	Valve Outlet CGA No.	Pressure psig @ 70F	Pressure kPa @ 21.1C	Approximate Ship Weights
				lbs	kgs
1F	510	31	214	198	90
1A	510	31	214	167	76
2	510	31	214	89	41
3	510	31	214	44	20
4	510	31	214	24	11
6	510	31	214	21	10
7	510	31	214	6	3
LB	170	31	214	6	3

 

Gas Grade Purity Specifications
Gas Grade Purity Specifications	Product Code	Cylinder Size	Content		Equipment Recommendations	Model No.
			US	Metric
Isobutane, Research Purity 99.995% Guaranteed Specifications Oxygen < 2 ppm Nitrogen < 2 ppm Methane < 1 ppm Ethane < 5 ppm Ethylene < 1 ppm Propane < 2 ppm Propylene < 1 ppm 2,2-Dimethylpropane < 2 ppm n-Butane < 10 ppm 1-Butene < 10 ppm 2-Butene (cis) < 5 ppm 2-Butene (trans) < 5 ppm Isobutylene < 2 ppm n-Pentane < 2 ppm Isopentane < 2 ppm Water < 1 ppm	1969071F 1969071A 19690702 19690703 19690704 19690706 19690707 196907LB	1F 1A 2 3 4 6 7 LB	116 lbs 35 lbs 15 lbs 5 lbs 2 lbs 0.88 lbs 0.44 lbs 0.375 lbs	52.63 kg 15.88 kg 6.80 kg 2.27 kg 0.91 kg 400 gm 200 gm 170 gm	Single-Stage Reg. Detector Tube Personal Monitor Tee Purge Cyl. Valve Wrench	Series 3530-510 8014-170S IQ250 4753-510 TW-4
	A certificate of analysis is available upon request. Custom analysis for sulfurs, alcohols and hydrides are available. Please contact your local branch for more information.

 

Gas Grade Purity Specifications	Product Code	Cylinder Size	Content		Equipment Recommendations	Model No.
			US	Metric
Isobutane, Matheson Purity 99.98% Guaranteed Specifications Oxygen < 5 ppm Nitrogen < 5 ppm Methane < 2 ppm Ethane < 5 ppm Ethylene < 10 ppm Propane < 5 ppm Propylene < 3 ppm 2,2-Dimethylpropane < 50 ppm n-Butane < 15 ppm 1-Butene < 25 ppm Isobutylene < 10 ppm n-Pentane < 5 ppm Isopentane < 10 ppm Water < 5 ppm	1969061F 1969061A 19690602 19690603 19690604 19690606 19690607 196906LB	1F 1A 2 3 4 6 7 LB	116 lbs 35 lbs 15 lbs 5 lbs 2 lbs 0.88 lbs 0.44 lbs 0.375 lbs	52.63 kg 15.88 kg 6.80 kg 2.27 kg 0.91 kg 400 gm 200 gm 170 gm	Single-Stage Reg. Detector Tube Personal Monitor Tee Purge Cyl. Valve Wrench	Series 3530-510 8014-170S IQ250 4753-510 TW-4
	A certificate of analysis is available upon request. Custom analysis for sulfurs, alcohols and hydrides are available. Please contact your local branch for more information.

 

Gas Grade Purity Specifications	Product Code	Cylinder Size	Content		Equipment Recommendations	Model No.
			US	Metric
Isobutane, Ultra High Purity 99.7% Guaranteed Specifications n-Butane < 1500 ppm Methane < 2 ppm Ethane < 5 ppm Propylene < 1 ppm n-Pentane < 10 ppm Propane < 50 ppm Water < 2 ppm	1969051F 1969051A 19690502 19690503 19690504 19690506 19690507 196905LB	1F 1A 2 3 4 6 7 LB	116 lbs 35 lbs 15 lbs 5 lbs 2 lbs 0.88 lbs 0.44 lbs 0.375 lbs	52.63 kg 15.88 kg 6.80 kg 2.27 kg 0.91 kg 400 gm 200 gm 170 gm	Single-Stage Reg. Detector Tube Personal Monitor Tee Purge Cyl. Valve Wrench	Series 3530-510 8014-170S IQ250 4753-510 TW-4
	A lot analysis is available upon request. Please inquire for individual cylinder analysis. Custom analysis for sulfurs, alcohols and hydrides are available. Please contact your local branch for more information.

 

Gas Grade Purity Specifications	Product Code	Cylinder Size	Content		Equipment Recommendations	Model No.
			US	Metric
Isobutane, Instrument Purity 99.5%	1969121F 1969121A 19691202 19691203 19691204 19691206 19691207 196912LB	1F 1A 2 3 4 6 7 LB	116 lbs 35 lbs 15 lbs 5 lbs 2 lbs 0.88 lbs 0.44 lbs 0.375 lbs	52.63 kg 15.88 kg 6.80 kg 2.27 kg 0.91 kg 400 gm 200 gm 170 gm	Single-Stage Reg. LB Regulator Detector Tube Personal Monitor Tee Purge Cyl. Valve Wrench	Series 3530-510 Series 3550-170 8014-170S IQ250 4753-510 TW-4
	A certificate of conformance will be provided upon request. A lot analysis is available at a nominal charge

Gas Grade Purity Specifications	Product Code	Cylinder Size	Content		Equipment Recommendations	Model No.
			US	Metric
Isobutane, CP Grade 99%	1969091F 1969091A 19690902 19690903 19690904 196909LB	1F 1A 2 3 4 LB	116 lbs 35 lbs 15 lbs 5 lbs 2 lbs 0.375 lbs	52.63 kg 15.88 kg 6.80 kg 2.27 kg 0.91 kg 170 gm	Single-Stage Reg. LB Regulator Detector Tube Personal Monitor Tee Purge Cyl. Valve Wrench	Series 1-510 Series 3550-170 8014-170S IQ250 4753-510 TW-4
	A certificate of conformance will be provided on request. All except LB can be furnished with full length eductor tubes for liquid withdrawal on request. For liquids use manual control only.