Polycyclic Aromatic Hydrocarbons (PAHs)

Polycyclic aromatic hydrocarbons (PAHs) are a group of over 100 different chemicals that are formed during the incomplete burning of coal, oil and gas, garbage, or other organic compounds. PAHs are known for their carcinogenic, mutagenic and teratogenic properties.

PAHs can be found in petrochemicals, rubber, plastics, lubricants, antirust oil, paints, leather and other products. Rubber and plastics are high risky materials containing PAHs. Tyre, electronics and toys are most affected by the restriction of PAHs in EU, German and US.

EU REACH Annex XVII has placed a restriction on the use of 8 PAHs in tyres and extender oil. Tyres will not be allowed to be placed on EU market if 8 PAHs exceed certain concentration thresholds listed in the following table. The restriction also applies to the marketing of tyres in EU.

Name

CAS

Structure

Limits

Benzo[a]pyrene

50-32-8

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1 mg/kg

Benzo[e]pyrene

192-97-2

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Sum of 8 PAHs < 10mg/kg

REACH has designated ISO 21461 as standard testing method for 8 PAHs in tyre.

For extender oil, IP346 is used.

According to the ISO 21461, tyres are compliant with the restriction on PAHs if the concentration of vulcanizates compound is not greater than 0.35% of Bay proton’s limit.

Benzo[a]anthracene

56-55-3

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Chrysene

218-01-9

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Benzo[b]fluoranthene

205-99-2

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Benzo[k]fluoranthene

207-08-9

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Benzo[j]fluorant

205-82-3

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Dibenzo[a,h]anthrancene

53-70-3

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In addition to the EU restriction of 8 PAHs in tyre and extender oil, German has decided on the mandatory Polycyclic Aromatic Hydrocarbons (16 PAHs) testing for the GS-certification process. US EPA has restricted 18 PAHs in consumer goods.

The limits for PAHs that must be met for materials of consumer goods are stated in the following table:

Parameter

Category 1

Category 2

Category 3

 

Material in contact with foodstuff, or materials intended to be put in the
mouth and toys for children age of < 36 months

Materials with foreseeable contact to skin for longer
than 30 seconds (long-term skin contact) and toys not covered by category 1

Materials with
foreseeable contact to skin up to 30 seconds
(short term skin contact) or without skin contact

Benzo(a)pyrene mg/kg

Not detectable(< 0.2)

1

20

Sum 18 PAHs (EPA) mg/kg

Not detectable(< 0.2)

10

200

Our PAHs Testing Services

CIRS is the first and also the only third party testing agency in mainland China that offers PAHs testing services according to both ISO 21461 and the German ZEK method.

We offer PAHs testing services according to the following criteria:

  • EU REACH 8 PAHs;
  • German 16 PAHs;
  • US EPA 18 PAHs;

 

About Us

Chemical Inspection and Regulation Service(CIRS) is a leading provider of toxic and hazardous substances testing and chemical regulatory consulting services with a strong focus on chemical compliance.

CIRS's testing lab located in mainland China has acquired the qualifications of China National Accreditation Service for Conformity Assessment (CNAS) and CMA and follows the ISO/IEC 17025.

Contact

Chemical Inspection and Regulation Service Ltd

Singleton House, Laurence Street, Drogheda, Co. Louth, Ireland
Tel: +353 41 9806 916 | Fax: +353 41 9806 999
Email:louise@cirs-reach.com | http://www.cirs-reach.com