Poppy seed [German version]

Table of contents

General:
Product information
Packaging
Transport
  Container transport
  Cargo securing


Risk factors and loss prevention:
Temperature Odor
Humidity/Moisture Contamination
Ventilation Mechanical influences
Biotic activity Toxicity / Hazards to health
Gases Shrinkage/Shortage
Self-heating / Spontaneous combustion Insect infestation / Diseases




Product information

Product name

German Mohnsaat
English Poppy seed
French Graines de pavot
Spanish Semilla de amapola
Scientific Papaver somniferum
CN/HS number * 1207 91 ff.


(* EU Combined Nomenclature/Harmonized System)



Product description

Poppy seeds are the oil-containing seeds found in the pods of the poppy Papaver somniferum, which belongs to the Papaveraceae family; the pods contain large numbers of small white, gray or bluish seeds. They are approx. 1 - 1.5 mm long, 1.1 mm wide and 0.9 mm thick. Poppy varieties with closed capsules are preferred, as the pores beneath the discoid stigma do not open, so minimizing losses during harvest.

Oil content:

42.5 - 50.8% [1]
45 - 50% [11]


Quality / Duration of storage

The most favorable shipping time is generally shortly after harvest; the year of harvest should therefore be ascertained before loading is begun, to avoid transporting excessively old goods.


Intended use

Poppy seeds are used in the food industry, pharmaceutics and as a feedstuff, but their most important use is as an oil-bearing fruit: when cold-pressed, poppy seed produces a good edible oil.


Figures

(Click on the Figures to enlarge them.)

Photo, poppy seed

Figure 1
Drawing, poppy seed

Figure 2



Countries of origin

This Table shows only a selection of the most important countries of origin and should not be thought of as exhaustive.

Europe Central Europe
Africa  
Asia South-East Asia, Middle East, Iran, Asia Minor
America  
Australia  


Back to beginning




Packaging

Poppy seed is transported as break-bulk cargo in bags of woven natural materials (e.g. jute) or woven plastic bags. The very small poppy seeds easily penetrate the fabric of the bags and, since there is a risk of bleeding, they are packaged in double-layer bags or in bags of particularly tightly woven fabric.

Marking of packages
Mark07.gif (2224 bytes)

Keep dry
Mark02.gif (2816 bytes)

Use no hooks
Mark04.gif (3269 bytes)

Keep away
from heat
(solar radiation)


Back to beginning




Transport

Symbols

Symbol, general cargo

General cargo



Means of transport

Ship, truck, railroad


Container transport

Ventilated containers (coffee containers), if the lower limits set for the water content of goods, packaging and container flooring and the oil content of the goods are complied with.


Cargo handling

In damp weather (rain, snow), the cargo must be protected from moisture, since it may lead to mold, spoilage and self-heating as a result of increased respiratory activity.

Hooks must not be used in handling bagged goods as they subject the cargo to point loads, so damaging the bags. Due to their shape, plate or bag hooks apply an area load and are thus more suitable for handling bags.


Stowage factor

1.70 m³/t (double-layered jute fabric bags, 100 kg) [1]
1.95 - 2.01 m³/t (bags) [11]



Stowage space requirements

Cool, dry, good ventilation


Segregation

Fiber rope, thin fiber nets


Cargo securing

Bagged cargo must be stowed and secured in the means of transport in such a manner that it cannot slip or shift during transport. If loss of volume and degradation of quality are to be avoided, the packages must not be damaged by other articles or items of cargo.


Back to beginning




Risk factors and loss prevention

RF Temperature

Poppy seed requires particular temperature, humidity/moisture and ventilation conditions (SC VII) (storage climate conditions).

Favorable travel temperature range: 5 - 25°C [1]

Temperatures > 30°C should not prevail for an extended period, as such temperatures promote respiration of the cargo and may cause self-heating. The cargo should not be stowed near sources of heat and particularly not above heated double bottom tanks.


Back to beginning




RF Humidity/Moisture

Poppy seed requires particular temperature, humidity/moisture and ventilation conditions (SC VII) (storage climate conditions).

Designation Humidity/water content Source
Relative humidity 70% [1]
Water content 8.2% [1]
Maximum equilibrium moisture content 65% [1]


Poppy seed must be protected from all forms of moisture (seawater, rain and condensation water), since moisture promotes hydrolytic/enzymatic fat cleavage, which then results in self-heating due to increased respiration.


Back to beginning




RF Ventilation

Poppy seed requires particular temperature, humidity/moisture and ventilation conditions (SC VII) (storage climate conditions).

Recommended ventilation conditions: air exchange rate at least 10 changes/hour (airing)

It is advisable to stow so as to leave trenches, so that, where necessary, water vapor and heat may be removed by suitable ventilation measures.


Back to beginning




RF Biotic activity

Poppy seed displays 2nd order biotic activity.

It is a living organ in which respiration processes predominate, because its supply of new nutrients has been cut off by separation from the parent plant.

The fat decomposition which takes place during the course of hydrolytic/enzymatic fat cleavage increases the risk of the cargo undergoing self-heating, possibly ultimately resulting in a cargo fire.


Back to beginning




RF Gases

In poppy seed, metabolic processes continue even after harvesting. The poppy seeds absorb oxygen and excrete carbon dioxide (CO2).

Respiration may cause life-threatening CO2 concentrations (TLV: 0.49 vol.%) or O2 shortages in the hold/container. Therefore, before anybody enters the hold, it must be ventilated and a gas measurement carried out.


Back to beginning




RF Self-heating / Spontaneous combustion

Oil content:

42.5 - 50.8% [1]
45 - 50% [11]


Poppy seed's elevated oil content encourages its tendency towards self-heating.

Because of its tendency to self-heating/spontaneous combustion, poppy seed may behave like substances from Class 4.2 of the IMDG Code.

Fat decomposition in poppy seed leads to the risk of self-heating and, finally, to a cargo fire.

Fat decomposition may proceed as follows:

by hydrolytic/enzymatic fat cleavage or
by oxidative fat cleavage


Hydrolytic/enzymatic fat cleavage:

If the critical water content of poppy seed is exceeded, this promotes hydrolytic/enzymatic fat cleavage. Fat-cleaving enzymes are activated by the elevated water content. The additional action of light and heat may accelerate this process. Free fatty acids sometimes have an unpleasant odor and taste. In the event of extended storage or improper cargo care, these cause the cargo to become rancid.

The free fatty acids formed are consumed by respiration processes in the poppy seed to form carbon dioxide and water, a process which is associated with considerable evolution of heat.

Self-heating of poppy seed is an extremely vigorous process, as the consumption of fatty acids by respiration processes is associated with a considerably greater evolution of heat than is the case with the respiration equation for carbohydrates. Here too, as with cereals, the spoilage process proceeds in a type of chain reaction, because heat and water are formed by the fatty acids consumed by respiration, which in turn contribute to an intensification of the process.

The self-heating of poppy seed requires only a small seat of moisture, so that within just a few hours heating may occur at moist points for which weeks or months would be required in goods dry on shipment.

Fresh poppy seed with a high water content tends towards rapid self-heating and may also ignite. Self-heating of poppy seed leads not only to a reduction in the utility value of this product (rancid odor and taste) but also has a qualitative and quantitative effect on oil yield. The color and bleachability of the oils are also negatively affected. The oil obtained complicates refining of the crude oils in subsequent processing, because a higher free fatty acid content makes decolorization substantially more difficult.

Hydrolytic/enzymatic fat cleavage and respiration may be limited by low temperatures; however, this may only be affected to a limited degree during transport. It is therefore important to ensure storage stability by complying with the limit values for the water content of the goods.


Oxidative fat cleavage:

Food components frequently react with atmospheric oxygen in spoilage reactions. Atmospheric oxygen may enter into an addition reaction with unsaturated fatty acids through the simultaneous assistance of light, heat and certain fat companion substances, and possibly also traces of heavy metals. It is therefore absolutely essential to store poppy seed in the dark and to protect it from oxygen and metal parts, since otherwise it becomes brown-colored and develops a rancid odor and taste.


Back to beginning




RF Odor

Active behavior Poppy seed has a very slight, pleasant odor.
Passive behavior Poppy seed is sensitive to strong foreign odors.



Back to beginning




RF Contamination

Active behavior The high oil content of the goods frequently causes dark fat stains to appear on the bags, which must therefore be kept from coming into contact with goods sensitive to contamination, such as baled goods, tea chests, marble etc..

Poppy seed in bags must not be stowed together with fibers or fibrous materials, either, since oil-impregnated fibers accelerate self-heating processes. The bags must not bleed, and care must be taken to ensure that the seeds do not become mixed with other seeds.
Passive behavior Poppy seeds are sensitive to dirt, fats and oils. The holds or containers must accordingly be clean and in a thoroughly hygienic condition before loading.



Back to beginning




RF Mechanical influences

Point loads applied for example by hooks may result in damage (tears) to the bags and thus to losses of volume. Plate or bag hooks, which, due to their shape, distribute the load and reduce the risk of damage, should thus be used.


Back to beginning




RF Toxicity / Hazards to health

Respiration may cause life-threatening CO2 concentrations (TLV: 0.49 vol.%) or O2 shortages in the hold/container. Therefore, before anybody enters the hold, it must be ventilated and a gas measurement carried out.


Back to beginning




RF Shrinkage/Shortage

Torn bags may lead to slight losses in volume.


Back to beginning




RF Insect infestation / Diseases

Typical pests of oil-bearing seeds/fruits are, for example, merchant grain beetles, peanut weevils, sawtoothed grain beetles, flour beetles, meal moths, dried fruit moths and mites, which may cause depreciation and weight losses.


Back to beginning