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Time of Issue: Apr. 12, 2013 9:26:28
Period OF Validity: Apr. 12, 2014 9:26:29
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Application: Carbon monoxide (CO) is a colorless, odorless, and tasteless gas that is slightly lighter than air. It is toxic to humans and animals when encountered in higher concentrations, although it is also produced in normal animal metabolism in low quantities, and is thought to have some normal biological functions. In the atmosphere it is spatially variable, short lived, having a role in the formation of ground-level ozone.

Carbon monoxide is used in modified atmosphere packaging systems in the US, mainly with fresh meat products such as beef, pork, and fish to keep them looking fresh. The carbon monoxide combines with myoglobin to form carboxymyoglobin, a bright-cherry-red pigment. Carboxymyoglobin is more stable than the oxygenated form of myoglobin, oxymyoglobin, which can become oxidized to the brown pigment metmyoglobin. This stable red color can persist much longer than in normally packaged meat. Typical levels of carbon monoxide used in the facilities that use this process are between 0.4% to 0.5%.

The technology was first given "generally recognized as safe" (GRAS) status by the U.S. Food and Drug Administration (FDA) in 2002 for use as a secondary packaging system, and does not require labeling. In 2004 the FDA approved CO as primary packaging method, declaring that CO does not mask spoilage odor. Despite this ruling, the process remains controversial for fears that it masks spoilage. In 2007 a bill was introduced to the United States House of Representatives to label modified atmosphere carbon monoxide packaging as a color additive, but the bill died in subcommittee. The process is banned in many other countries, including Japan, Singapore, and the European Union.

 

Product Specification

Name

Carbon Monoxide

CAS No.

630-08-0

MF

CO

EINECS No.

211-128-3

 

Index

Packaging Detail

Grade

2N5

4N

Impurity

Content

Content

Oxygen

≤ 200 ppmv

≤ 5 ppmv

Nitrogen

≤ 600 ppmv

≤ 40 ppmv

H2O

≤ 50 ppmv

≤ 3 ppmv

CO2

≤ 100 ppmv

≤ 5 ppmv

THC

≤ 4000 ppmv

≤ 5 ppmv

Cylinder

GB5099, 40L

Valve

QF-30

WP

12.5Mpa, 5 M3

G.W

62 kg

N.W

7 kg

L x W x H

0.22mx0.22mx1.5m

 

 

 

Physical Date

Molecular Weight

28.01 g/mole

Boiling Point

-312.7oF (-191.5oC)

Specific Volume

13.8889 ft3/lbs at 70oF

Vapor Pressure   @70oF (21.1oC): Above the critical temp. of -220.4oF (-140.2oC)

Liquid Density at Boiling Point

49.5 lb/ft3 (793kg/m3)

Gas Density at 70oF. 1 atm

0.072 lb/ft3 (1.15kg/m3)

Solubility In Water

Very slightly

Freezing Point

-337.1oF (-205.1oC)

Evaporation Rate

N/A (Gas)

Specific Gravity (Air=1)

@70oF (21.1oC) = 0.96

Appearance And Odor    Colorless, odorless gas.



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