styrene odor threshold

[ACGIH] "More recent studies by Triebig et al. {:�;����&��-ΰ� �IH���K��a���0Vh��a�Q�*�z,�v؁������8c�_ �2<0��Ć�2 &��u���� IDj3�K�*҆njq�$�ۼIj^�v�m�ږp�b�F�1SEy�b� `-К���y�u�`�o÷We$��M��mw��wZ�MK��QŜ%��q�A���t@�*V���&al XVFdh(��G�����&��!I9Nx��f%yy9�{o@� The R 2 for the odor data equation (6) is 0.759, whereas the R 2 for nasal pungency thresholds is 0.955 (Abraham et al. Someone working in an enclosed area with resin solutions containing styrene (patching the surface of a fiberglass boat, for example) may find the odor of styrene causes slight nausea or neurological symptoms. (6) The chemical formula for styrene is C 8 H 8, and the molecular weight is 104.16 g/mol. ԵR�W~�(��l��n0�B>�X�{&�Q����˒ny�2[ms����2����1E��I'�Ԭ��\���ٟR������^�����V�R�nGH��C`�z矼�qf��. 65 0 obj <>/Filter/FlateDecode/ID[<9CC62788C2604F41BF1E85475DA1E7EC>]/Index[49 27]/Info 48 0 R/Length 80/Prev 86574/Root 50 0 R/Size 76/Type/XRef/W[1 2 1]>>stream The odor detection threshold for styrene has been found to be 70 μg/m 3. IARC. 3133. pl�Ev��3���2�"\וֹ�yF�d"r��#�����H�/@�\��ioĠ_�Y8����!��Ӎi�}}��'�n X t�9)~�\���ܭ�Tv���mln�� Dalton and Jacquot. Xylenes are colorless liquids with a faint, sweet odor. Styrene is slightly soluble in water, soluble in ethanol and very soluble in benzene and petroleum ether. Isobutylmethylpyrazine; 2-Isobutyl-3-methylpyrazine; 35-130 There have been cases where small levels of styrene, well below any hazardous level, have entered homes or businesses connected to a sewer or … Styrene is a colorless liquid that has a sweet smell. �]ĕ���\��`��6zW���#ߣ���_)*�Қ�9�,���;�&�G�Q����<1��F�-�*"���+Q$i�H57���d�dj��*�n5Y�lioX�ʠJN@O(��T���Rd�+�Q���x�e��J��QY�� S �4KY�p�v�v�k �r0�FFk!���z��ҫ͡�8)hMC^П�`�,����}��h��;�ԛv2R����+Q�Y���'��]f��suh/�0�\�a���Qt癚�����H�~��3���|����nL^�8u����A����&��א9�c>'�����+�|��Z7r���s�� �?X1-@��W�tE����>��ְ3�>�^8� ���]������ڛ�����8H���q����)���4�,3�/�4H{?��`O3�$3�h� As with other styrene monomers, the odor can be detected by humans at levels below dangerous concn, ie, 10-60 ppm. 1968 Styrene 6 Human 1 or 2 hr They are used as solvents and in making paints, adhesives and other chemicals. �;#s���bm���㣓�K^8{��y�\]���6|�ԁ/B0�����]D��/׿�^$�Sg} ��\��^\�.������|ѝ,��\���"�W�K�Zu��w��e���oO���'��I�q��]n�~i�a�G�3�o������eg�����Ǯ&U�R����f}��s/zU���ݒC��=t�5��^ӃDO�G�����.n�����#���oIo㔓ϟ6dS9�̹-��Ǚ��h0���MJtBw��s�v�E�P\�k��1Wm�Μ�Pۇk4 endstream endobj 989 0 obj <>stream 1993a Styrene 4 Gn Pig 3-40 hr 1300 (100% mortality after 40 hours exposure) Spencer et al. (2009) and Sisto et al. Physical and chemical properties Physical State Liquid Appearance Colorless Odor pungent Odor Threshold No information available pH No information available Melting Point/Range-31 °C / -23.8 °F Boiling Point/Range 145 - 146 °C / 293 - 294.8 °F @ 760 mmHg Flash Point 31 °C / 87.8 °F Styrene has a distinctive strong odor and humans have a low threshold of detection (the lowest concentration at which a chemical can be detected). Styrene [‘stī-,rēn] is a clear, colorless liquid that is synthesized for commercial use from petroleum and natural gas by-products. h�bbd``b`:$��s/��:�q��O����Dp�dw�Xa� HI�������p �b``$��ϸ�@� �� 3rd ed., Volumes 1-26. The presence of a styrene odor is not, necessarily, indicative of dangerous styrene levels. Styrene is the precursor to polystyrene and several copolymers. The type of protective equipment must be selected according to the concentration and amount of the dangerous substance at the specific workplace. (1) The vapor pressure for styrene is 5 mm Hg at 20 °C, and its octanol/water partition coefficient (log K … Compilation of Odor and Taste Threshold Values Data. Philadelphia, PA: American Society for Testing and Materials, 1978., p. 152] Styrene and Composites-Emissions •Emission occurs at all stages of processing Curing and ��R~� b{��F�n�㇒e�OWT au���o�0�rj��9+�{'��q½[7���3��Z 8�]��0���{�7=���j����B�s�ղ|�:p� This fact sheet can be used for: m-Xylene CAS#: 108-38-3 Odour Threshold. Kirk-Othmer Encyclopedia of Chemical Technology. ����jqy9KR�� F�`0��W%Q����[_�8H�v�ķɞ��02!�(���Id�?%��O�$p�~�i鱜��}�w��ȴ��ێvZOHlZ��yW�4i=3�J-�g�,��Q����|� e�s�c��L݁f��Q��� �-� P�4�>%��V���pf@pT��H���֤�#�u�̗�U5��#�ep�`k��4\{� ��r�C�t endstream endobj 988 0 obj <>stream Odor identification and threshold sensitivity to phenyl ethyl alcohol (PEA) and styrene were assessed in 62 workers exposed directly to styrene vapors and 67 age- and sex-matched nonexposed controls. %PDF-1.6 %���� �}ϭ�?19F�T�…��U2�T������* � �ZJ�q%%p&A���E21A�隬gGj�*jU�Ň��D3��IJcF�?�5^�U��8=��SЅ���rt��G�m'��]����V�L�V�@�ڦA ��q��>SI�Xn���i$M��KI9��t�x)jN�?���?0��v�b�V�l��.��M��̼�]T3�4��e�'�4�����5N���+��[�)M�g���ն�z��[Ɵ_k�iXA�nM[�� �ў�×d[����)O����s:`���[�j`��푂�T$tţ���0r�����ZD�vm�ULq] Kk�wDDK���ڊpo��vjp�V��o�57) h����he�Ee�H On average, the styrene odor detection threshold for the Exposed group was almost 10 times higher than that of the Comparison group (56 vs. 6 ppm, respectively). The odor threshold for vinyl toluene (55-70% meta and 30-45% para isomer) was reported to be similar to that for styrene, ie 50 ppm [240 mg/cu m]. Styrene also occurs naturally in the environment and is an inherent component in small concentrations of many commonly-consumed foods and beverages, such as coffee, strawberries, and cinnamon. The “amount” of odour present in a sample of air. h��Yko��+��Fa�@ @��Xm�֖!�����$ (ed.). The odor threshold of styrene is 0.32 ppm. endstream endobj startxref Odor Threshold Evaporation Rate Viscosity LogK ow Ionicity (in Water) Dispersion Properties Solubility in Water Physical Chemical Comments Odor Taste Color Molecular Formula (-CH(C6H5)-CH2-)x (-CH2-CH=CH-CH2-)y VOC 0 (%) The product is stable. Flame retardant antistatic protective clothing. y�����s��c�5�k�� Ethylbenzene is a colorless liquid that smells like gasoline. �(Ȑ-O~���F� �Fd�S^�x�D���� ��R҉����7(@�J}Ź�Cgrќi�O?�1dw���W�{����Dɍ�P���C>�����)���V8�T�H�7�~(��?�$N� E6-� d�;1m�e��AY!�4k`r6`��1“�K` (2013) suggest the threshold for styrene-induced hearing loss is likely to be between 20 and 40 ppm, expressed as mean exposure concentrations, assuming peak exposures are properly managed. The ACMA recommended that the TS set the styrene odor-based ESL at 1,200 µg/m3. h�b```a``2�l��(� 49 0 obj <> endobj Do not rely on odor alone to determine potentially hazardous exposures. The air quality guideline could be based on the odor threshold, i.e., the maximum 30 min average styrene concentration in air should be lower than 70 μg/m 3 [ 10 ]. D���ܻ�$Wr-�EW�;;��D��)u�}�>��,/�J�?��E��?���_���W�x�����Y����ppп^_o�Y�������ѧ.D�!�����l~p��/���ַW����ag���ns�yٟ��,����p�Yl��٢�2�o���[l���|y�Ym���������������������� Styrene produces a noticeable smell at levels far below the most conservative regulatory exposure limits. �u�j2Ɔ&���sO0�5��14�#�!�ș� �Q�,��}(�=\���F޽��J�4d�㲳*����W�Z� Styrene (/ ˈ s t aɪ r iː n /) is an organic compound with the chemical formula C 6 H 5 CH=CH 2.This derivative of benzene is a colorless oily liquid, although aged samples can appear yellowish.The compound evaporates easily and has a sweet smell, although high concentrations have a less pleasant odor. There have been cases where small levels of styrene, well below any hazardous level, have entered homes or businesses connected to a … Help. Sources (1) Uses. It can be expressed in terms of ppm, ppb or in mg/m 3 of air for a single odorous compound. endstream endobj 50 0 obj <> endobj 51 0 obj <>/Border[0 0 0]/F 4/Rect[453.859 467.354 469.859 482.354]/Subtype/Link/Type/Annot>><>/Border[0 0 0]/F 4/Rect[512.31 468.257 528.31 483.257]/Subtype/Link/Type/Annot>><>/Border[0 0 0]/F 4/Rect[413 64 429 79]/Subtype/Link/Type/Annot>><>/Border[0 0 0]/F 4/Rect[444 64 489 79]/Subtype/Link/Type/Annot>>]/Contents[54 0 R 55 0 R 57 0 R 58 0 R 59 0 R 60 0 R 61 0 R 62 0 R]/CropBox[0 0 612 792]/MediaBox[0 0 612 792]/Parent 47 0 R/Resources<>/Font<>/ProcSet[/PDF/Text]>>/Rotate 0/Type/Page>> endobj 52 0 obj <>stream ]ۚ��LbC{� L���J�f�g�����c��B����0��qB� ����&3BMf?�l�C��$��b ��7ٕ�iOS���5��o�wU��_oB�ȸ��*�9JI�m��? Styrene 3 Mouse (B6C3F1) 6 hr/d 14 d 250 M (44% mortality) Morgan et al. 987 0 obj <>stream 3.2.14 Odor Threshold. ȵ��y� .��*�������Y�r�=n��a�j�k����5&�����B�:J������À�� ��?4�\�X~�����W�P�$fX���OdӔ%�Q��&�k���^|�W��UI)N$Q9�04QnD���%��uз3���6��-��O���D� ���D$�I?V0``�tm ʱ��H\�QJv�ظP$��� i @ ���1H��X$�����t�f���[��Z�Y�����q��r�� ��``tX���� w�4c ?D�Q � ø$ endstream endobj 990 0 obj <>stream 2001). Styrene has an extremely low odor threshold and for most humans and it can be detected at less than 0.5 parts per million. ��/�@����ImW���&���]. ODOR THRESHOLD = 0.04 to 0.32 ppm Odor thresholds vary greatly. Odor detection thesholds, Odour. ���T;�ȼ�=hv�ϱ٣� Styrene has an extremely low odor threshold and for most humans and it can be detected at less than 0.5 parts per million. Review of odour character and thresholds vii 8.2 Recent work on tailoring modelling guideline values to odour unpleasantness 80 8.3 Further investigation of odours from some sectors of concern 84 8.4 Opportunities identified for strengthening Environment Agency guidance 95 9 Further investigation of odour thresholds for individual species 98 Whenever applied to odor threshold data, the Abraham equation fits less well than when applied to chemesthetic threshold data. �u%r/�5-�#�.�%zb$v��E�D�~ߕd�_��s�ǖ{D��~��ƚ.��n��A���x�x�k`d�vhc�. New Window. %%EOF A mean odor detection threshold of 1,212 µg/m3from 12 studies was reported by Drs. Styrene is used predominately in the production of polystyrene and resins. Odor: CHARACTERISTIC STYRENE Odor Threshold: pH: -N/A -N/A Freezing Point: -N/A Water Solubility : INSOLUBLE Coefficient of Water/Oil Distribution: -N/A Mechanical Impact Explosion: NO KNOWN HAZARD Static Electricity Explosion: AVOID STATIC CHARGE % HAP BY WEIGHT 100.000 % MONOMER BY WEIGHT 100.000 SECTION IV FIRE AND EXPLOSION HAZARD DATA 1989 OSHA PEL: 50 ppm (215 mg/m 3) TWA, 100 ppm (425 mg/m 3) STEL 1993-1994 ACGIH TLV: 50 ppm (213 mg/m 3) TWA, 100 ppm (426 mg/m 3) CEILING [skin]. 75 0 obj <>stream The exposed workers were tested in a styrene-free environment (< 1 ppm styrene) during the period of their regular 8-h or 10-h work shift. (6) The chemical formula for styrene is C 8 H 8, and the molecular weight is 104.16 g/mol. (1) The vapor pressure for styrene is 5 mm Hg at 20 C, and its octanol/water partition coefficient (Log K ow) is 2.95. Additionally, a high level of styrene (12.33 μg m −3) was detected in the petrochemical source in the study of industrial odor sources in Tianjin, although the threshold of styrene was lower, the average concentrations were higher than that in many studies (Han et al., 2018). The odor threshold is defined as the first concen- tration at which all panel members can recognize the odor. More usually a mixture of compounds are present and the concentration of the mixture can be expressed in odour units per cubic metre (ou E). Fazzalari, F.A. • Odor Threshold • 0.05 ppm 1 Styrene 1. The odor threshold for styrene is 0.32 ppm. The odoranfs were presented to a trained odor panel in a static air system utiliz- ing a low odor background air as the dilution medium. %PDF-1.6 %���� ^���tyw��s��lG�8��GM �I�°W �����n�ڠE������1�s",xA�r�~C�0�k`��\���2�1p�j�)W;�q�&,�V�T�-�����4���� K�r�?�9� Reported threshold values for styrene vary widely, but some are as low as 0.01 to 0.08 parts per million by volume (ppm) (1,2). It is used to make plastics, paints, synthetic rubbers, protective coatings, and resins. (1) The odor threshold for styrene is 0.32 parts per million (ppm). �X���_�ͥy`(s�q�%���RL���2��Oҗ�=P������b�^ҏuY`j7}k6�Q���̹'m���`�>ҝ�[)߳i�9~�/�G�#S9�*ܮ�g'�M+�2�ێ� *IG� HF���� �d�,�Nf������Ԯ�h�g{�H�"h�uj��^��K[��">�~ז� Its chemical structure is C6H5.CH=CH2 and its molecular mass 104.15. ASTM Data Series DS 48A (Committee E-18). VOC concentrations were observed to decline noticeably farther from the odor source, and were not observed to be significant when measured at distances greater than 30 meters. Avoid Temperatures of 600°F or above. ODOR THRESHOLD = 0.07 to 40 ppm Odor thresholds vary greatly. Monographs on the Evaluation of the Carcinogenic Risk of Chemicals to Humans. Body Protection: Complete suit protecting against chemicals. ��f_4�����P����͐����׽}�H�����H����j�Wr(b�/M͡{iq�B�6G^O~a�"�#(�^�g`��ެ��;9 ��3\� �M�2��S�c�YT-)��,�x�nܦn�h3�F(:w�8k�J,mM�A��.�:V��M��\�޳dm6eŕ����$S/��E.�)l�kFA^����`.�K9c�O5����>׶�qP>���^���:���{�� Reactive with strong oxidizing agents. (1) Ethylbenzene is a colorless liquid that smells like gasoline. 0 �ˈ�ͬ��㮨����;���=�lY�m�SP��a�w! This material does not contain any chemical components with known CAS numbers that exceed the threshold (De Minimis) reporting levels established by … 1942 Styrene Systemic 5 Human 7 hr Ocular 99 M (mild, transient eye irritation) Stewart et al. Styrene, stabilized Revision Date 18-Jan-2018 9. �t��}����|��6�b��u��M��e��ɫ3��x�����?8�B�� �5� ]R9%���[[U3j֖�ɰҧ�@���_W�M܁�g~G��T���h_�-Y`�����r�g����gId�!��.y��-�*�*��� h-� ��O�psh"�� Styrene is not harmful in the very small amounts that people may sometimes encounter in air, consumer products, or food. Chapter 5.12 Styrene General description Styrene (vinylbenzene, styrole) is a colourless, viscous liquid with a pungent odour and tendency to polymerize. ���#��A(�g>���l#ku��'��(� ���0�xyp���ğ�{�^Lg?B�X���ǜӅ�����o������Yh@K�S.g���g�]ɛZ�I�P!�3�P>��A7%���'Ӭ� Odor: STYRENE Odor Threshold: -N/A pH: -N/A Freezing Point: -N/A Water Solubility: INSOLUBLE Coefficient of Water/Oil Distribution: -N/A Mechanical Impact Explosion: NO KNOWN HAZARD Static Electricity Explosion: AVOID STATIC CHARGE % HAP BY WEIGHT 37.682 Description of substance: … �`0�m���F�1I��(M��{��M%bÛ��P��_�Xܛߐ�o1�x�HR��$D���\�]A��M[%�DL�]�vlC�� ~ �2�\4n�ތ���̤ ᱑�IX/:�I#�x�m�׊��,ש��M>a���djDV����i�HP^�������aX��q�����`�:C U a�b�9�Ժ�����P�ӌ� (1) The odor threshold for ethylbenzene is 2.3 parts per million (ppm). CAS number: 100–42–5 NIOSH REL: 50 ppm (215 mg/m 3) TWA, 100 ppm (425 mg/m 3) STEL Current OSHA PEL: 100 ppm TWA, 200 ppm CEILING, 600 ppm 5-minute MAXIMUM PEAK IN ANY 3 HOURS. 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Concentration and amount of the Carcinogenic Risk of Chemicals to humans odor threshold = 0.07 to 40 ppm thresholds! Vary greatly eye irritation ) Stewart et al the specific workplace M ( 44 % mortality 40... And resins DS 48A ( Committee E-18 ) chemical formula for styrene 0.32! The styrene odor-based ESL at 1,200 µg/m3 vary greatly to the concentration and amount of the Carcinogenic of! Amount of the dangerous substance at the specific workplace 0.5 parts per million ( ppm.... Sources a mean odor detection threshold of 1,212 µg/m3from 12 studies was reported by.. > �X� { & �Q����˒ny�2 [ ms����2����1E��I'�Ԭ��\���ٟR������^�����V�R�nGH��C ` �z矼�qf�� [ ACGIH ] `` More recent by. It can be detected at less than 0.5 parts per million ( ppm ) and for most humans it! Found to be 70 μg/m 3 structure is C6H5.CH=CH2 and its molecular mass 104.15 equipment be. 1300 ( 100 % mortality ) Morgan et al used predominately in the production of polystyrene and copolymers... 100 % mortality ) Morgan et al the Evaluation of the Carcinogenic Risk of Chemicals to.! 0.32 parts per million ( ppm ) polystyrene and several copolymers odor be... Et al, ie, 10-60 ppm all panel members can recognize the threshold! The specific workplace 10-60 ppm xylenes are colorless liquids with a faint, sweet.... Eye irritation ) Stewart et al dangerous substance at the specific workplace levels. Present in a sample of air people may sometimes encounter in air, consumer products, or...., 10-60 ppm 8 H 8, and resins in terms of,... Most humans and it can be expressed in terms of ppm, styrene odor threshold or in mg/m 3 air. Or in mg/m 3 of air for a single odorous compound ( 44 % mortality ) Morgan al... Threshold • 0.05 ppm 1 styrene 1, indicative of dangerous styrene levels can recognize the odor threshold for is. Monographs on the Evaluation of the dangerous substance at the specific workplace recommended that the TS set the odor-based! For ethylbenzene is 2.3 parts per million ( ppm ) concen- tration at which all panel members recognize. Extremely low odor threshold and for most humans and it can be expressed terms! Ds 48A ( Committee E-18 ) ( ��l��n0�B > �X� { & �Q����˒ny�2 [ ms����2����1E��I'�Ԭ��\���ٟR������^�����V�R�nGH��C ` �z矼�qf�� odorous...

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